Ayt Muhammad Ray Shehri the care taker of Abdul Azim Al-Hasani shrines said that, When Imam Hussain (A.S) was preparing to leave on his longest journey, he wrote a letter to his brother Mohammad Hanafiyyah in which he explained three objectives of his stand:
1. To reform his grandfather's nation
2. Enjoining Good and Forbidding Evil
3. Revival of the traditions of the Holy Prophet (PBUH) (PBUH) and Imam Ali (A.S).
When he reached Mecca he wrote a letter to the people of Basra;
"I invite you towards the Book of Allah and the Sunnah of the Holy Prophet (PBUH) because indeed Sunnah has been mutilated and hereby is revived. Whoever will accept my words, I will guide him towards the straight path".
Imam Hussain A.S. did all these sacrifices to save people from ignorance.