Imam explains the matter through his famous book "the combat with the self" as following:
If you purify your intentions, rectify your deeds, expel love of self and position from your hearts, a high station will be prepared for you. The whole world and what exists will be prepared for you.
The whole world and what exists in it along with its superficial aspects is not worth even a cent by comparison to the station prepared for the righteous servants of God. Try to achieve this lofty station.
If you are able, try to make something of yourselves and improve yourselves so that you may pay no heed even to this lofty station.
Do not worship God in order to reach this station but rather call upon Him and prostrate yourselves with your heads upon the earth before Him because He is worthy of worship and the Almighty. In that case you will have torn through curtains of light and have attained the source of greatness, Imam further explained.
Can you obtain such a position with these deeds and actions which you perform? Can this be reached by the path you tread? Is it easy to be saved from divine chastisement and to escape the terrible torment and the fire of hell?
Do you imagine that the weeping of the Pure Imams and the cries of Imam Sajjad (‘a) were a teaching, and that they wanted to instruct others about how to cry?
With all this spirituality and the lofty position they hold, they wept for fear of God!
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