Imam Khomeini cited roots of divine savior's belief from basic Islamic sources. Imam Khomeini highlighted that the divine savior who is well decorated with divine wisdom, knowledge, mercies, virtues and characteristics, will prevail justice among human societies.
Imam Khomeini on several occasions also stated that the belief was not merely restricted to Muslims, but followers of all divine religions have firm faith in emergence of a divine savior.
According to Imam Khomeini, the savior from progeny of the holy prophet of Islam is a divine-oriented perfect man which bears spiritual characteristics and carries out tasks for God’s sake and will.
He maintained that the auspicious birthday anniversary of divine savior is a feast of humanity since Mahdi (PBUH) will guide all the human beings; He will wipe out truculence and tyranny from the face of earth
Imam Khomeini said in series of messages in this regard as following.
"I am hopeful that the certain day will approach when the promise of God will come true and the oppressed will become inheritors of the earth.”
"If the birthday of the Prophet is a great feast, the birthday of The Promised Mahdī also stands a great feast for the Muslims and mankind …. as Mahdī will spread righteousness and the globe will be filled with justice at its various grades." ( Sahifeh-ye-Imam, Vol.12, page 409)
"Imām Mahdī is assigned to set right all these perversions and deviations. He will bring man from the abyss of depravation. It is said: “He fills the earth with justice after having been replete with tyranny.” ( Sahifeh-ye-Imam, Vol.12, page 409)
" The Prophets’ errand was to spread justice into the world. But they did not succeed in their mission. God has preserved The Promised Mahdī in reserve to carry out this mission when God deems fit… His justice will embrace every aspect of human life, every dimension of man’s entity." ( Sahifeh-ye-Imam, Vol.12, page 408)
Imam Khomeini also in a historic message shed light on the philosophy of savior as following:
I present my congratulations to the Muslims and the nation of Iran for the festivity of the 15th Sha`ban that is the birthday of Imam Mahdi (PBUH). Sha`ban is a great month. In this month, the great Savior of mankind is born. The issue of the disappearance of the Imam is a great matter that makes us to understand some of the issues. One of them is: Real justice should be spread in the world in its true sense. This is a great thing. There is none among mankind except Mahdi for this task- God has preserved him in reserve to carry out this mission when God deems fit his birth stands a great feast for the Muslims and mankind. When Imam Mahdi appear he will set right every perversion. He will bring man from the abyss of depravation. It is said: "He fills the earth with justice after it is replete with tyranny." All the inhabitants over the globe are in perversion. The good and perfect people are having perversion and deviation though they themselves may not be aware of. The conduct, the behavior, the belief, the actions-all is deviated. Man in his performance deviation is evident. Imam Mahdi is assigned to set right all these perversions and deviations. He will remove the torturous and sinuous things. The earth will be replete with justice in its true sense. Therefore, from this point of view, this is a feast for all Muslims. Since Mahdi will guide all the human beings, it is a feast of humanity. He will wipe out truculence and tyranny from the face of earth.
(Sahifeh-ye Imam, vol. 12, pp. 409-10).