Imam explains the matter through his famous book "combat with the self" as following:
An evil scholar, a scholar who inclines toward the world, a scholar who thinks of preserving his position and administrative post, will not be able to combat the enemies of Islam.
He will be more harmful than others. Take a step for the sake of God. Dispel the love of the world from your heart. Then you will be able to engage in combat.
From this moment on, develop and raise this point in your heart, that I must be an armed soldier of Islam, and sacrifice myself for Islam.
I must work for Islam until I am destroyed. Do not make excuse for yourself that today is inappropriate.
Try to be useful for the future of Islam. In short, become a human being! The colonialists are afraid of human beings. They are afraid of man.
The colonialists, who want to plunder all we have, will not allow the training of human beings in religious and scholarly universities.
They are afraid of man. If a man is found in a country, it bothers them, and endangers their interests. It is your duty to make something of yourselves, to become perfect men, and to stand up against the vicious plans of the enemies of Islam. If you are not organized and prepared, of you do not resist and combat the lashes which whip the body of Islam every day, not only will you yourselves be destroyed, but also the precepts and laws of Islam will be annihilated, and you will be responsible.
You ‘ulama! You scholars! You Muslims! You will be responsible. First you ‘ulama and seminary students and then the rest of the Muslims will be responsible: “All of you are shepherds and all of you are responsible for tending the flock.”
Read more:
God has made your heart His own habitation, Imam Khomeini explained