There is a question that occupies the minds of many of us; what will remain of us in this world after we are long gone? Have we left this world and the generations followed by us a worthy legacy? Or we will soon be forgotten? Or even worse, we have left so much evilness and destruction that would never be wiped away from the face of this world? Looking at the lives of prominent figures, throughout the history of Islam, we realize how much effort they have put into spreading a valuable message and leaving behind an enduring legacy for future generations. Despite being under the restraint and pressure of the Caliphs of his time, Imam Sadiq (AS), the sixth Imam of Shias and one of Prophet Muhammad's (PBUH&HP) grandchildren, has left Muslims with the most considerable amount of religious content which turned into an essential point of reference for them until the present.

In what follows, we will have a look at the life of Imam Sadiq (AS), this praised personality. 

Birth and Lineage

Ja'far b. Muhammad b. 'Ali b. al-Husayn b. 'Ali b. Abi Talib (AS), known as Imam Sadiq (AS), was born on April 20, 702, in Medina. His father was Imam Muhammad al-Baqir (AS), and his mother was Umm Farwa, the daughter of al-Qasim, son of Muhammad b. Abi Bakr [1]. He had the opportunity to spend twelve years of his life with his grandfather, Imam Sajjad (AS), and thirty-one years with his father. His title al-Sadiq, which literally means "truthful," was given to him, since he avoided any direct involvement in the uprisings of his time [2]. 

Imam Sadiq (AS) had ten children, among whom was Imam Musa al-Kazim (AS), who was born on 745 A.D. 

Imam Sadiq (AS) 's Life at the time of Umayyad's Caliphate 

After the martyrdom of Imam Baqir (AS), Imam Sadiq (AS) was chosen as the leader of Shia Muslims, which lasted thirty-four years. The period of Imam Sadiq (AS) 's leadership coincided with the reign of the last five Umayyad caliphs, including Hisham b. 'Abd al-Malik, Valid b. Yazid b. 'Abd al-Malik, Yazid b. Valid b. 'Abd al-Malik, Ibrahim b. Valid b. 'Abd al-Malik and Marwan b. Muhammad.

 While Imam Sadiq (AS) witnessed a period of hardship and restrain under the reign of Hisham, after some years due to the weakening of Umayyads, which finally led to the fall of this dynasty, he found the chance to engage in scholarly activities and promote the actual Islamic teachings. He held many secret gatherings and meetings in which up to four thousand people attended, Imam Sadiq (AS) transferred his knowledge to his students, which later quoted many Hadiths from him and turned into authentic sources for future Muslim scholars [3]. 

Imam Sadiq (AS) 's Leadership at the time of Abbasid's Caliphate

After the fall of the Umayyad dynasty, Imam Sadiq (AS) witnessed the rise of Abbasid caliphs and lived during the reign of two of them, including al-Saffah and al-Mansur al-Dawaniqi. During the time of the first Abbasid caliph, al-Saffah, which was a period of instability and social and political upheavals, being engaged mostly in abolishing the remaining of Umayyad dynasty and their followers, provided Imam Sadiq (AS) with an excellent chance to go on with his scholarly and religious efforts and attract as many students as he could. 

Nevertheless, with the coming of al-Mansur to the throne, a period of total suppression and severe restraint began. During his realm, people lived in utter terror, and any kind of opposition was punished severely. Therefore, al-Mansur considered Imam Sadiq (AS) and his followers as a threat to his throne, and since Imam Sadiq (AS) was a public figure respected by all the people, he couldn't hurt him directly. So, he tried to weaken Imam's (AS) reputation and social status by enticing his students to engage in a debate with Imam Sadiq (AS) and defeat him. But all their efforts were futile [4]. 

Al-Mansur made many attempts to bring harm to Imam Sadiq (AS) and summoned him a few times to his court, intending to assassinate him, yet he wasn't successful. Imam Sadiq (AS) generally didn't tend to meet al-Mansur and attend his court. Al-Mansur was offended by Imam Sadiq's (AS) manner and one day asked him, "Why don't you come to meet me in my court like others?" and Imam (AS) answered, "I didn't do anything to be afraid of you, and you don't benefit us in the hereafter so that I would have hope in you. This position of you is not a blessing to be congratulated by me, and you don't find it a disaster to be comforted by me. So why would I attend you?" [5]   

Fighting against Deviatory Movements 

During Imam Sadiq's (AS) life, some religious groups formed, which deviated from the true teachings of Islam and Prophet Muhammad's (PBUH&HP) tradition. To oppose these movements and save Islam from such deviations, Imam Sadiq (AS) held many debates with the heads of these groups and tried to bring their falsehood into the light. Or he would send his students to have discussions with them. He always advised his students and followers to be wary of such deviatory movements and cut all ties with them. 

Scholarly and Scientific Movement 

As it was mentioned above, Imam Sadiq (AS) enjoyed an excellent opportunity to spread his knowledge among as many people as he could, which resulted in the transmission of a significant number of hadiths from him to the future generation. Therefore, most of the hadiths in fiqh or theology are from Imam Sadiq (AS) [2]. Due to his significant role in spreading the true Islamic teachings, Twelver Shiism is often called Ja'fari School [3]. Moreover, he held many dialogues and debates with theologians and scholars of different sects and religions, and even atheists, in which he managed to prove the authenticity of his stance. Some of the most famous students of Imam al-Sadiq (a) are Zurara b. A'yan, Burayd b. Mu'awiya, Jamil b. Darraj, 'Abd Allah b. Muskan, 'Abd Allah b. Bukayr, Hammad b. 'Uthman, Hammad b. 'Isa, Aban b. 'Uthman, 'Abd Allah b. Sinan, Abu Basir, Hisham b. Salim, Hisham b. al-Hakam. 

Prominent Moral Characteristics

Imam Sadiq was famous for his piety, knowledge, abundant and devoted worship, and great generosity [7]. It is reported that he spent a significant part of his time praying, fasting, or saying dhikr (remembrance) [8].  

Many narrations are reported about his generosity and kind manner toward people who lived in poverty. For instance, "it is reported that the Imam (AS) gave four hundred dirhams to a beggar, and when he thanked the Imam (a), he (a) gave him his ring, which was worth 10,000 dirhams. According to another report, the Imam would put some bread, meat, and money in a bag and would take it to the houses of the poor and divide it among them, without letting them know who he was. Abu Ja'far al-Khath'ami reports that Imam al-Sadiq (a) gave him a bag of money and asked him to give it to someone from Banu Hashim without telling him from where the money was coming. When Abu Ja'far gave the money to that man, he prayed for the sender and told him that this person always sends him money, but Imam al-Sadiq (a) never sends him anything even though he is rich!" [9] 

Martyrdom

Imam Sadiq (AS) was martyred on 765 A.D. at the age of sixty-three, poisoned by order of al-Mansur al-Dawaniqi. He was buried in the al-Baqi' Cemetery beside his father, Imam Baqir (AS), his grandfather Imam Sajjad (AS), and his uncle Imam Hasan (AS) [10].   
  

References:

1. Mufīd, Muḥammad b. Muḥammad al-. Al-Irshād fī maʿrifat ḥujaj Allāh ʿalā l-ʿibād. Vol.2, P.180.  
2. Pākatchī, Aḥmad. 1389 Sh. "Imām Jaʿfar Ṣādiq (a)". Dāʾirat al-Maʿārif-i Buzurg-i Islāmī 18:180-220. 
3.  Shahīdī, Sayyid Jaʿfar. Zindigānī-yi Imām Ṣādiq Jaʿfar b. Muḥammad (a), p. 47. 
4. Al-Suyuti, History of the Caliphs, p. 208-209. 
5. Baha' al-Din 'Ali b. 'Isa al-Irbili, Kashf al-ghumma fi ma'rifat al-a'imma, vol.2, p.208.  
6. Kulaynī, Muḥammad b. Yaʿqūb al-. Al-Kāfī. vol. 1, p. 79, 80, 171-173. 
7.  Baha' al-Din 'Ali b. 'Isa al-Irbili, Kashf al-ghumma fi ma'rifat al-a'imma, vol.2, p.691. 
8.  Majlisī, Muḥammad Bāqir, Biḥār al-anwār, vol. 47, p. 16.
9. Imam sadiq
10. Ibn Shahrāshūb, Manāqib Āl Abī Ṭālib, vol. 4, p. 210. 

For those who believe in the afterlife, there is often this concern that whether they go to heaven or hell. Some Muslims believe that being a Muslim suffices for entering heaven, but is that true? If so, what happens to those who are born to non-Muslim families? Some believe that all Muslims are Arab or to become Muslim one should be whether Arab or know Arabic. Then, they might ask about what will happen to those who do not know Arabic. Since no one chooses where to be born, is it fair to send those born among disbelievers (Kafir) to hell? What will happen to converts because of their past before conversion to Islam? These and other questions are all answered here.

Heaven or hell? It is up to you!

Some people believe that God has created mankind to send some of them to heaven and the rest to hell! But, it is not true at all. One is totally free to follow the divine guidance and reach heaven or to deny it and go to hell. Hence, everyone determines him\herself where he\she goes after death.

According to the Quran, God will curse those who are disbelievers and die while they are still disbeliever (2:161). They will remain in hell forever, their punishment will not be alleviated, nor will they be reprieved (2:162). On the contrary, those who are faithful to God and do righteous deeds (98:7) will be rewarded the Gardens of Eden. God will be pleased with them, and they will be pleased with Him (98:8).

Knowing that not having faith will end in hell, what will happen to believers? Will they all enter heaven?

What will happen to the followers of the previous monotheistic faiths?

Islam recognizes the freedom and other rights of the followers of the previous religions; also, has ordered Muslims to hold them in considerable respect [1]. Moreover, Islam knows those followers eligible for salvation; it all depends on one’s deeds and faith in God. In Surah al-Baqarah it is said that: “Indeed, the faithful, the Jews, the Christians, and the Sabaeans—those of them who have faith in Allah and the Last Day and act righteously—they shall have their reward from their Lord, and they will have no fear, nor will they grieve” (2:62).  In other words, according to the Islamic principles, it is disagreeable to punish those who have not received the message of Islam either before its rise or after that, and God will never do that.

Are all Muslims allowed to enter heaven?

In Surah Al-i-Imran it is said that anyone who follows a religion other than Islam will be among the losers in the Hereafter (3:85). So, being a Muslim, on its own, is the prerequisite for entering heaven; but it is not enough. The key to the eternal salvation and heaven is doing good deeds. Whoever submits to Islam but does not do any good deeds will not go to heaven. On the contrary, there are people who are not Muslim, as we call it, but they will accept Islam if they receive its message and therefore, they might enter heaven. In other words, one should have faith and submit to God, and this should be manifested in one’s acts.

In Surah al-Hujurat, the difference between belief and submission is clarified (49:14). By saying the two testimonies (Shahada), one submits to Islam, but being faithful is more than that. To have faith in God deep in the heart, one should obey God and his messenger, Prophet Muhammad (PBUH&HP) (49:14), and this should be reflected in one’s conduct [2].

It is also stated that the noblest of people before God is the most righteous of them (2:13). This is logical, too. We also, as human beings, naturally like and appreciate those who are good and do good deeds. Hence, what is important is one’s deeds. Skin color, race, language, nationality, gender, age, and social class do not solely lead to salvation and heaven. Two clear examples in this regard are the son of Prophet Noah (PBUH) and the wife of Prophet Lot (PBUH) who both did not believe in prophet’s message and were thus condemned to Hell. Their stories warn that in spite of being a member of the family of the prophet, one might deviate, disobey God and move towards hell.

How about disbelievers?

Among disbelievers (Kafir), there are those who deny the truth and will never submit to the divine guidance. These will never enter heaven, as mentioned earlier. There are also non-Muslims who have not received the message of Islam, and they are not responsible for not receiving it, but they will surely accept Islam as soon as they know about it. These will not be punished and will not go to hell since the Quran says: “We do not punish (any community) until We have sent (to them) an apostle” (17:15).

References:

1. Monotheistic faith
2. M. H. Tabataba'I, “Tafsir al-mizan”, (2 :14).