1. Observe Justice

If you observe justice about yourself, you will be trusted in judging others.
Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.2, p.146.

2. The time of Injustice and Treachery

At a time when you see nothing but injustice and treachery, trusting anyone (unheedingly) brings wretchedness. 
Ibn Shu’bah, Tuhaf al-Uqul, p.357. 

3. Constant Calamities 

Following a calamity after another is the herald of liberation from them.
Ibn Shu’bah, Tuhaf al-Uqul, p.357.

4. Investing Your Trust

Do not invest your trust fully on your friend, since if you fail and lose everything because of dedicating all your love and trust to one person, you could hardly survive its disastrous outcomes.  
Ibn Shu’bah, Tuhaf al-Uqul, p.357.

5. Islam, Faith, Assurance 

Islam is the basis on which faith is founded, and then on faith, assurance is built. People hardly reach the last level, that is assurance. 
Ibn Shu’bah, Tuhaf al-Uqul, p.358.

6. This World

Losing your heart to this world brings you pain and grief while being indifferent and pious to it brings peace to your heart and soul. 
Ibn Shu’bah, Tuhaf al-Uqul, p.358.

7. Three Characteristics of a Believer 

The believer finds righteousness in three characteristics: a deep understanding of the religion, avoiding excessiveness in life, and forbearing the hardships. 
 Ibn Shu’bah, Tuhaf al-Uqul, p.358.

8. Allah's Blessings 

Allah bestows His blessings upon a group of people, and it is turned into burdens on them due to their ingratitude; yet, He inflicts others with calamities, and they turn into blessings due to their forbearance. 
Ibn Shu’bah, Tuhaf al-Uqul, p.359.

9. How to Treat Your Family according to Imam Sadiq (AS)

Whoever does good to his family, Allah prolongs his life. 
 Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.8, p.219. 

10. Making Friends

Meet and make friends with someone who elevates and honors you, not the one whose only purpose is to benefit from you and is pretentious. 
Al-Hurr al-Amili, Wasa'il al-Shia, Vol.11, p.412. 

11. Greetings 

Saying hello is a recommended act (Mustahab) while responding to it is obligatory (Wajib). 
Ibn Shu’bah, Tuhaf al-Uqul, p.360.

12. Be Resistant 

Whoever manifests resistance at times of anger, greed, fear, and lust, Allah will protect his/her body against the fire of hell. 
Ibn Shu’bah, Tuhaf al-Uqul, p.361.

13. Well-being 

Well-being is a less valued blessing; it is forgotten when one is blessed with it, yet it will be reminded of as soon as it is gone. 
Ibn Shu’bah, Tuhaf al-Uqul, p.361.

14. Comfort and Hardship

In comfort, Allah blesses you with His beneficence and excellence, and in hardship, the chance of purging [from your sins]. 
 Ibn Shu’bah, Tuhaf al-Uqul, p.361.

15. Water 

Do not pollute the water that people need. 
Abu Ja'far Muhammad Ibn Hasan Tusi, Tahdhib al-Ahkam, vol.1, p.185.

16. Moderation

Allah loves moderation and hates wastefulness.
Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.4, p.52.

17. Wastefulness 

The least act of wastefulness is throwing away the remaining of [food or drink].
Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.6, p.460.

18. The Weather 

If the weather were always bright and sunny, the earth would turn dry, and the plants would burn off the heat; the water in lakes and rivers would go down, and people would suffer; the weather would be hot and dry, and an unknown kind of sickness would emerge. 
 Mohammad-Baqer Majlesi, Bihar al-Anwar, vol.3, p.125.

19. Muslim Friends 

Between two Muslim friends, the one that loves the other is the better one.
Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.3, p.193.

20.The Elderly and Children 

Respect the elderly and be kind to the children.
Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.2, p.165.

21. A Joyful Life 

Life is joyful with three things: clean air, plentiful and pure water, and a soft land [ready for planting]. 
Ibn Shu’bah, Tuhaf al-Uqul, p.320.

22.Washing Hands

Wash your hands before and after eating. 
Ahmad b. Muhammad b. Khalid al-Barqi, Al-Mahasin, vol.1, p.425.

23. Be Careful About What You Wear

Do not wear clothes that attract much attention, neither clothes, which debases you. 
Muhammadi Reyshahri, Mizan al-Hikma, hadith no. 18080. 

24. Brush Your Teeth

Brushing teeth is among the manners of prophets.
Muhammadi Reyshahri, Mizan al-Hikma, hadith no. 9053.

25. On Expressing Your Opinions 

Do not be the first person who expresses his/her opinion when asking for a consult and avoid suggesting naïve views. 
Muhammadi Reyshahri, Mizan al-Hikma, hadith no. 9868.

26. Paying the Wages of a Worker 

Pay the workers' wages before their sweats are dried [ i.e., right after they have finished their work]. 
Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.5, p.289.

27. Manners toward Your Teacher 

Be humble in the presence of the one from whom you learned a knowledge.
 Abu Ja'far Muhammad Ibn Hasan Tusi, Tahdhib al-Ahkam, vol.2, p.36.

28. Justice in Imam Sadiq (AS)'s Words 

Justice is more pleasant than the water, which is offered to a thirsty person.
 Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.5, p.289.

29. A piece of Advice for Industrialists

Every industrialist has to master three characteristics for his/her work to flourish; he/she has to be expert in his/her job, has to be reliable and meet their superior managers' demands. 
Mohammad-Baqer Majlesi, Bihar al-Anwar, vol.78, p.236.

30. People's Needs 

People need three things; security, justice, and welfare. 
Ibn Shu’bah, Tuhaf al-Uqul, p.320.

31. A Father's Best Legacy 

A father's best legacy for his children is manners, not wealth.
Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.8, p.150.

32. Planning 

Planning shapes half of your life. 
Al-Shaykh al-Saduq, Al-Khisal, p.221.

33. Teenagers 

Take care of teenagers since they are more open to absorbing goodness and virtues.
Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.8, p.93.

34. Books 

There will be chaotic days when people would not find peace unless within their books.
Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.1, p.52.

35. Agriculture 

Agriculture is a precious wealth. 
Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.5, p.261.

36. Strengthening Ties 

Strengthen your ties with each other, be kind and generous to each other. 
Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.2, p.175.

37. Help Each other 

Any believer who solves another believer's problem, Allah will lift seventy of his/her difficulties in this world and the hereafter. 
Mirza Husayn Nuri, Mustadrak al-wasa'il, vol.12, p.413.

38. Fruit Trees 

Do not cut fruit trees, or you will be inflicted with Allah's torment. 
Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.5, p.294.

39. The Best Friend 

My favorite friend is the one who bestows me my faults.
Ibn Shu’bah, Tuhaf al-Uqul, p.366. 

40. Earn Halal Income 

Whoever wishes his/her prayers to be granted, should strive to earn Halal income. 
Mohammad-Baqer Majlesi, Bihar al-Anwar, vol.93, p.373.

The concept of responsibility in Islam includes a wide range of matters. Human beings have certain responsibilities in Islam toward others and themselves. All creatures in this universe are naturally inclined to move toward the perfection considered for each of them. They are created in the most proper form, then, have been provided with the conditions and requirements that God has planned (20:50).

Nonetheless, none of them knows neither the path that they should pave nor the final target; except humans. According to the Quran, human beings are created for specific reasons (23:115), and they have duties and responsibilities (75:36). The most prominent responsibility in Islam that one has is towards God, as explained in the first part of the article. He\she is also responsible towards him\herself. This category of duties is discussed here.

The Rights that One Has Over Him\herself as His/her Responsibility in Islam

According to Imam Sajjad (AS), the duties of every human being towards him\herself are to serve only God by all his\her capabilities and every part of the body; and, to respect the rights of each part of the body [1]. Hence, the responsibilities in Islam of every human being towards him\herself can be divided into spiritual and physical items.

Responsibility in Islam towards the Soul

According to the Quran, God breathed into the human being of His [created] soul after he was proportioned (38:72). This makes the human’s soul of great value in Islam. Accordingly, every individual has certain responsibilities towards his\her valuable soul. These duties can be summarized in one sentence: to utilize the soul in the way of God.

That is to apply all spiritual capacities in the obedience to God and to do what brings bout God’s satisfaction. This requires one to keep the soul alive and pure by practicing what is ordered to or invited to in Islamic teachings like prayer (Salat), fasting (Sawm), pilgrimage (Hajj), etc., also by preventing any harm to the soul such as anxiety, depression, etc. 

The Rights that the Parts of the Body Have and One's Responsibility in Islam toward them

One’s acts and words form and determine the his\her path in life. He\she does various acts (including good deeds, what is obligatory (Wajib) or recommended (Mustahab)) with different parts of the body and verbally thank God (in the form of prayer) with the help of tongue and mouth. Hence, whatever one does concerning the obedience of God depends also on the parts of the his\her body. Therefore, he\she has some responsibilities towards them.

The Rights of the Tongue

Of the rights of the tongue are to [1]:

Avoid foul language and the sins that one might commit with the tongue, such as backbiting (ghibah) and slander. Prophet Muhammad (PBUH) said that: “Do not insult others, this turns them into your enemies” [2], and: “Whoever divulges the flaws and faults of another Muslim, God will reveal his flaws” [3]; 
Accustom it to saying pleasant beneficial words;
Force it to talk nicely and politely (2:83);
Stop it from talking too much and stay silent unless talking is beneficial; “Silence is a door to wisdom, it brings affection and guides to every blessing.” [4], and: "whoever believes in God and the Hereafter should say beneficial words, otherwise stays silent.” [5];
Think about what you are going to say and judge the words before you start talking because a wise person will be judged by his words; “A faithful person … thinks about his words first, and then says those words” [6].

The Rights of the Ears

The ears are like the doors to the heart; they transfer every word with either a positive or negative influence on the heart [1]. Imam Ali (AS) has prevented us from listening to the words without any advantage and benefit as they darken the heart and cause us to be blamed [7]. For example, whoever listens to backbiting is a partner of the backbiter [8]. Hence, one should control the ears to hear only nice and useful words that purify the heart or encourage good behavior [1]. 

To be continued. 

References:

1. Imam Sajjad (AS), Treatise On Rights (Risalat al-Huquq).
2. M. al-Kulaynī, “Al-Kafi”, vol. 2, p. 360.
3. Al-Monzeri, “Invitation and Intimidation”, vol. 2, p. 239.
4. M. al-Kulaynī, “Al-Kafi”, vol. 2, p. 113.
5. M. al-Kulaynī, “Al-Kafi”, Introduction, p. 6.
6. W. al.Hilli, “Tanbih al-khawatir wa nuzhat al-nawazir”, vol. 1, p. 106.
7. “Ghurar Al-Hikam Wa Durar Al-Kalim”, T. 6234.
8.  A. Saberi Yazdi, “Al-Hokm Al-Zahera”, p. 558.