What should one do who has been suffering from whispers and imaginations about God and the Messenger for ten years, which have affected their worship? And are these whispers from the self, or Satan, or a punishment from God? And why do they increase in Ramadan, even though the devils are chained therein?

You must turn away from obsessive thoughts and frequently seek refuge in Allah. Avoid isolation and surrendering to your own self and Satan, for the cure for obsessive thoughts is turning away. Schedule a program for yourself that fills your time and energy, and regularly recite the Qur'an, perform night prayers (Qiyam al-Layl), and engage in remembrance (dhikr). Learn what you need concerning religious matters, serve yourself and your community, engage in permissible sports, and associate with the righteous.