Mahdism

If you regret what you have done, turn to God in repentance, and resolve not to repeat your mistake, you will find the Imam of Our Time more compassionate than ever and receive his attention. He is always aware of our deeds; when we repent and feel remorse, the door to his mercy opens to us.

Repentance will no longer be accepted at the time of the Imam of the Age’s (AJ) appearance, because the era of his appearance is a distinct, end-times state of being, and repentance then will be like repentance in the intermediate realm (barzakh), when it is no longer of any benefit. Repentance must take place before punishment comes and while there is still an opportunity to do so. This means that one must not treat repentance as license to sin recklessly; rather, one should turn to God while sin is still possible and before punishment arrives.