He was entrusted, for more than 23 years, with propagating Allah's words and message to humanity. It was this role that brought him to a collision with his people. 

He was inflicted with all forms of adversity, from the pain of hunger to the struggle of battles. Yet, throughout the 23 years of his mission, the Prophet (Peace Be upon Him) always remained just and steadfast in his actions.

His conduct was measured by a fear of displeasing Allah. During this mission, he changed the history of Arabia and laid the foundations of a permanent change in the world's history. 

Within 100 years, this religious revolution caused the decline and then defeat of the Persian, Sassanid, and Byzantine empires. Islam swept through: 

1- I Iraq and Iran to Bukhara, Uzbekistan, in the east. 

2- Syria and Palestine to Egypt and then North Africa, in the west.