Is the door of repentance still open for a sinful servant who occasionally commits acts of apostasy and suffers from whispers that prevent him from performing good deeds? And is repentance from these matters permissible?

The door of repentance is open and will not be closed in anyone's face as long as the soul has not reached the throat. Sincere repentance is accepted, no matter how great the sin, and the one who repents returns as if he had not sinned, as stated in the Hadith: "The one who repents from sin is like one who has no sin." As for the whispers concerning good deeds, they do not necessitate repentance; rather, they must be repelled and not indulged in. Regarding the episodes mentioned, it is advisable to consult a trustworthy psychiatrist.