The responsibilities of a Muslim towards family, relatives and other Muslims in general, were already reviewed in an article. Here one's responsibility in Islam towards neighbors, friends, and enemies are discussed.

The Responsibility in Islam Towards Neighbors 

Doing good to neighbors is highly emphasized in Islamic teachings: “Worship Allah and … be good to … the near neighbor and the distant neighbor” (4:36). Prophet Muhammad (PBUH&HP) advised Imam Ali (AS) to honor the neighbors, even if they are disbelievers (Kafir) [1]. Imam Ali (AS) said that Prophet Muhammad (PBUH) used to invite repeatedly to doing good to neighbors such that we thought he (PBUH) was going to consider an inheritance for them [2].

The rights of neighbors on one another as an important responsibility in Islam, are:

To honor them in their presence, and to help and care about them when they are absent [3]. It includes visiting neighbors when they are sick, to assist their funeral, and to offer them your tasty meals that smell good [4];
To keep their secrets. It means that not to look for their faults and errors. And, if ever you become aware of some of their faults, do not reveal them but try to conceal their deficiencies [3];
Do not leave neighbors alone in difficulties [3]; e.g., help them in case of financial needs [4];
Do not be jealous of them if God grants them some blessings [3];
Ignore their errors to yourself and forget about them. If ever they do wrong to you unintentionally, be patient and in peace with them [3];
Do not let others talk behind their back and reveal the deficiencies of your neighbors here and there [3].
Giving priority to the neighbors. It is narrated from Imam Hassan (AS) that Lady Fatima al-Zahra (AS) used to pray firstly for the neighbors and then for members of the family [5]. 

According to Imam Sadiq (AS), having good behavior and interaction with neighbors increases the provision (Rizq) [6]. Prophet Muhammad (PBUH) advised to respect neighbors as much as one should respect his\her mother [6] and he (PBUH) said: “God bless whoever does good to his\her neighbors” [7]. On the contrary, whoever sleeps peacefully at night while one of the his\her neighbors is hungry, God will deprive him of his blessings on the judgment day [8]. The same will happen to whoever annoys his\her neighbors [1]. 

Take your time and think about these attitudes towards the neighbors. Life will be surely much agreeable and peaceful if we improve our social interactions with our neighbors within the Islamic framework.

The Rights of Friends and Companions

Having a good companion is known as a blessing; on the contrary, a bad one is like a disaster [9]. Friends and companions have certain rights one over the other including:

To interact with them with generosity as much as you can, otherwise, be fair to them [3];
To be smiling when you meet them and to receive them modestly [3];
To respect them as they respect you [3];
To be the first one who does good to the other one, otherwise, try to compensate properly [3];
To help them in difficulties and whenever they are in need, as Imam Ali (AS) advised to [10];
To hold them in great affection according to Imam Ali (AS) [11];
Not to reveal their deficiencies and mistakes;
To encourage them in obedience to God and to prevent them from committing sins [3];
To be honest with them and not to cheat [3]; e.g., nor to talk behind their back neither to reveal their deficiencies and to guard their secrets;
To be trustworthy whenever they rely on you [3].

The Responsibility in Islam Towards the Enemies

The enemy here means a person whom one is in conflict with. There are some recommendations in Islamic resources on how to treat enemies and what is one's responsibility in Islam towards them:

To be fair with them [12]. According to Imam Sadiq (AS), a real believer (Mu'min) does not oppress his\her enemies [13];
To testify in favor of the enemies if they are right [14] even if your testimony is against yourself [3];
To keep the promises you made to your enemies [15];
To forgive and tolerate them, if possible [3]. According to Imam Ali (AS), there is a virtue in forgiving enemies [16];
To talk nicely and shortly with whoever you have complained of [3], to argue with them in a way that is best (16:125), and not to ignore their rights if ever you are wrong [3].

References:

1. M. Shoueiri “Jami’ al-Akhbar”, p. 84.
2. Shaykh al-Kulayni, “Al-Kafi”, vol. 7, p. 51.
3. Imam Zayn al-'Abidin (AS), “Treatise On Rights (Risalat al-Huquq)”.
4. responsibility towards others
5. Shaykh al-Saduq, "Ilal Al-Shara'i", p. 181
6. Shaykh al-Kulayni, “Al-Kafi”, vol. 2, p. 666.
7. Shaykh al-Saduq, “Al-Amali”, p. 288.
8. Shaykh al-Kulayni, “Al-Kafi”, vol. 2, p. 668.
9. “Ghurar al-Hikam wa Durar al-Kalim”, T. 4719-4720.
10. “Nahj al Balaqa”, p. 494.
11. “Ghurar al-Hikam wa Durar al-Kalim”, T. 9665.
12. Ibn Shu’bah, “Tuhaf al-Uqul”, p. 88.
13. Shaykh al-Kulayni, “Al-Kafi”, vol. 1, p. 47.
14. Shaykh al-Saduq, “Sifat al-Shia”, p. 24.
15. “Nahj al Balaqa”, p. 53.
16. “Ghurar al-Hikam wa Durar al-Kalim”, p. 435.

We keep hearing arguments about Islam from different people. Some question Islam as a real religion, and others try to prove that Islam is the true religion sent by God. However, I think that there is a major problem with these types of arguments. In fact, many people who undermine Islam by questioning it are not usually in search of truth. Rather, their sole goal is to humiliate Islam and make themselves happy with whatever belief they have. 

Although Islam encourages people not to accept anything without understanding, when it comes to the point where arguments and discussions have no learning point, and become only a waste of time, Islam orders Muslims not to argue with people who have no intention to learn and improve; “do not dispute concerning them, except for a seeming dispute”. (18: 22)

Therefore, in this text, I would not try to justify the validity of Islam for those who have no intention to consider Islam as a path in life. But I would like to share my amazing experiences of being a Muslim with those who are looking for a safe path in life. Also, I will explain why I believe that Islam is the most complete religion and guideline in the world. 

All Prophets were Muslims

Is that true to say all prophets from Adam, Abraham, Moses, Jesus to Prophet Muhammad (peace be upon them) were Muslims? Or is it just a tool that Muslims use to justify Islam as the best religion? To find the answer to this question, we must first understand what Islam is.  

The word Islam means submission, and Muslim is the person who is submitted to God and His divine orders. Now, let’s have a look at the following verses of the Quran that state all religions that have been sent by God were sent to make humankind submitted to God (Muslims).

Abraham (PBUH) as a Muslim

In Chapter Baqarah when the story of Abraham and his son Ishmael (PBUT) is narrated, while they are making the house of God in the current city of Makkah, they pray God to make them Submissive (Muslim) to Him: 

“As Abraham raised the foundations of the House with Ishmael, [they prayed]: ‘Our Lord, accept it from us! …. ‘Our Lord, make us submissive to You, and [raise] from our progeny a nation submissive to You …” (2: 127-8) And then in another chapter of the Quran, Allah informs believers that Islam first came from Abraham; “The faith of your father, Abraham. He named you ‘Muslims’.” (22: 78)

Also God orders the Prophet Muhammad (PBUH) to emphasize the fact that the religion he brought is the same as the religion of Abraham (PBUH): “(O Prophet!) Say, ‘Indeed my Lord has guided me to a straight path, the upright religion, the creed of Abraham, a Hanif, and he was not one of the polytheists.” (6: 161)

Moses, Josef (PBUH) and Other Prophets as Muslims 

Prophet Josef (Yusuf) (PBUH) prays to his lord to take his soul while he is a Muslim: “Let my death be in submission [to You], and unite me with the Righteous.” (12: 101)

“And Moses said, ‘O my people! If you have faith in Allah, put your trust in Him, if you have submitted [to Him].’” (10: 84) The last part of this verse in the Quran is written as “if you are Muslims.” 

“Say, ‘We have faith in Allah and in what has been sent down to us, and what was sent down to Abraham, Ishmael, Isaac, Jacob, and the Tribes, and that which Moses, Jesus, and the prophets were given by their Lord. We make no distinction between any of them, and to Him do we submit.” (3:84)

Every Religion Is Islam

According to what we discussed so far, we release that “all Prophets irrespective of the fact whether they had or did not have an independent code of law, had the same mission and preached the same message.” [1] The prophets came with the same message from God to guide human beings to the right path, and the nature of human beings in all eras are the same; “So set your heart as a person of pure faith on this religion, the original nature endowed by Allah according to which He originated mankind (There is no altering Allah’s creation; that is the upright religion, but most people do not know.)” (30: 30) 

And in another verse, it is explained that:  “Indeed, with Allah religion is Islam, and those who were given the Book did not differ except after knowledge had come to them, out of envy among themselves...” (3:19)

Therefore, the guideline that is sent for human in all eras should be the same, as the nature of human beings in all periods has been the same. There are some rulings in the Quran that may change according to the conditions of the time. Since, Islam is a universal religion, not a contextual one. 

“Should anyone follow a religion other than Islam, it shall never be accepted from him, and he will be among the losers in the Hereafter.” (3: 85)

Why Islam of Muhammad (PBUH&HP)?

Now that we discussed all the prophets were Muslims, and the only religion sent by God was Islam, why do we say that the religion of Prophet Muhammad (PBUH) should be followed, not the religion of Prophet Moses (PBUH) or Prophet Jesus (PBUH) or even prophet Abraham who was the father of Muslims?

It is said in the Quran that Prophet Muhammad (PBUH&HP) was a role model for humankind: “There is certainly a good exemplar for you in the Apostle of Allah—for those who look forward to Allah and the Last Day.” (33:21) 

While it is also stated in the Quran that Prophet Abraham and his followers such as Prophet Lout (PBUT) were role models for mankind: “There is certainly a good exemplar for you in Abraham and those who were with him, when they said to their own people, ‘Indeed we repudiate you and whatever you worship besides Allah.” (60: 4)

As mentioned before, Islam started with Prophet Abraham (PBUH), and he is named in the Quran as the father of Muslims. While in the above verse he is mentioned as a role model for Muslims. The same is with Prophet Muhammad (PBUH) who is called a role model for Muslims. Therefore, one can conclude that the only thing that makes the religion of Prophet Muhammad (PBUH) the last and most complete religion is the growth of this religion throughout the time. 

People’s intellectual immaturity was the main reason why God renewed his message and developed it over time. However, by the advent of Islam and revelation of the holy Quran, humanity had passed the period of its childhood and had become mature enough to preserve its intellectual heritage, i.e., the religion of God [2].

Scientific Signs in the Quran

There are many scientific points in the Quran that has been mentioned about 1400 years ago. These issues have been discovered by scientists only during the past 200 years.  I would mention a few examples and will leave the rest for you to study in the Quran. 

Embryology 

Issues regarding embryology have been mentioned in the Quran: “Certainly We created man from an extract of clay. Then We made him a drop of [seminal] fluid [lodged] in a secure abode. Then We created the drop of fluid as a clinging mass. Then We created the clinging mass as a fleshy tissue. Then We created the fleshy tissue as bones. Then We clothed the bones with flesh. Then We produced him as [yet] another creature.” (23: 14) and in another chapter, it is said: “created man from a clinging mass.” (96: 2)

Cosmology 

With regards to Big bang as the start of this universe, Allah says: “Have the faithless not regarded that the heavens and the earth were interwoven and We unraveled them, and We made every living thing out of water?” (21: 30)

Many years ago people believed that the shape of the earth was flat and they had a fear of falling down the edge of the earth at a point when the earth is finished! [3] While 1400 years ago in the Quran Allah says: “It is He who created the night and the day, the sun and the moon, each swimming in an orbit.” (21: 33) “Thereafter He spread out the earth” (79: 30), but He mentions that although the earth is not flat, we have created in a way that you can walk on it without the fear of falling down: “Allah has made the earth a vast expanse for you.” (71: 19)

Anthropology: Quranic Verses that Are against Human Rights 

One of the reasons that some people stand strongly against Islam is that they say there are some rules in the Quran that are against human rights. In answer to such arguments, one should ask ‘Who defines human rights?’

Human rights that we have in our era is created by human beings and does not go any higher than human understanding. When a human mind tries to create human rights, with the best considerations, they may always forget about some other aspects of human being and the atmosphere around him. Therefore there is no doubt that in many cases, human rights that are written by human beings may be against real human rights. 

Quranic verses that do not make sense

Having discussed all the above points, I sometimes come to a point where I cannot understand some points of the Holy Quran according to my logic. What to do at these times?
I assume that a sound mind would say that when most of something makes complete sense to you and amazes you for its incredibility, then for that one percent, maybe I should think that the problem is not with the book, but with my understanding. 

In the end, I would like to invite people to wisely think about their way of life, their goals, and aims in life. I would like to ask every human to read the Quran as a book that would definitely have many pints for human growth in it; shall it be scientific, moral, social or lifestyle points, it can help all of us to experience a better personal and social life. 

References: 

1. https://www.al-islam.org/printpdf/book/export/html/19182
2. https://www.salamislam.com