Guidance and leadership of society by chosen successors of the prophets is an important subject that is mentioned in the Quran and the pure speech and rule of Prophet Muhammad (pbuh) testifies it. The Almighty God states, “And (remember) when his Lord tried Abraham with (His) commands and he fulfilled them, He said: Lo! I have appointed thee a leader for mankind. (Abraham) said: and of my offspring (will there be leaders)? He said: my covenant includes not wrong-doers.” In addition, Prophet Muhammad (pbuh) points out that “People’s problems would be solved while the Twelve [Imams] lead them.” Based on this account, we get to know that Prophet Muhammad (pbuh) has mentioned the number of his successors that include Imam Reza (AS) as well.
The life and personality of Shia Imams consist of two valuable and distinguished but related aspects: Imams’ political, social, moral, scientific characters were manifest for everyone during their lifetime. Understanding these traits does not need special religious background because every wise person can perceive those values and privileges. Imams’ spiritual and moral characters are rooted in the divine providence. Allameh Mohammad Baqer Majlesi has quoted 48 traditions through which Imam Musa al-Kazem (AS) has introduced his son, Imam Reza (AS) as his successor.