The Prophet’s Spiritual State at the Time of His Mission
This paper discusses the part of the life of the Prophet wherein all of the aims of the Prophet’s apostleship and all of his teachings are concentrated. Those who believe in the doctrine of prophethood acknowledge that it is a divine duty and a mission from God. They consider that God appointed it to those whom He selected from among His good servants, from those who were exalted among mankind. 
They believe that Allah sent the Prophets to teach people wisdom
The Imamate of Imam Musa Kazim (A.S.)
Whatever the Holy prophet has said about the Imamat, has already been mentioned in the previous chapters. Every Imam has mentioned about his successor. Just as Imam Ali Amirul Momeneen appointed Imam Hasan as his successor, Imam Hasan appointed Imam Husain, Imam Husain appointed Imam Zainul Abedin, Imam Zainul Abedin appointed Imam Muhammad Baqir, Imam Muhammad Baqir appointed Imam Ja’far Sadiq, Imam Ja’far Sadiq appointed Imam Musa Kazim , Imam Musa Kazim was appointed Imam during the lifetime of his father as subsequent proofs will testify.