Whispers in Creed

Question : The questioner says: I am a young man who holds firmly to prayer and fasting, praise be to Allah, but at times Satan sends me thoughts that make me doubt the existence of Allah, that our religion is the truth, that the Messenger is truthful, that the Qur'an is the word of Allah, and that we will be held accountable on the Day of Resurrection for all the fasting, prayer, and good deeds we do. I am troubled by this whispering and I want to get rid of it. How can I be convinced of my religion and that it is the truth, and how can I repel this whispering?

Answer : The answer is that we say this shirk (associating partners with Allah) that has happened to you is a result of your faith, because whenever Satan sees that a person has held firmly and is certain, he opens the door of doubts and skepticism for him, hoping to corrupt his religion. The Companions (may Allah be pleased with them) complained to the Prophet (peace and blessings be upon him) about something like that, and he said, "Did you find it?" They said, "Yes." He said, "That is the pure faith." What does "pure faith" mean?
It means its essence, meaning this is the pure faith that contains no doubt. The Messenger (peace and blessings be upon him) said, to the heart of Khalid to corrupt it. When it was said to Ibn Mas'ud or Ibn Abbas that the Jews say they do not experience whispering in their prayers, he said, "Yes, and what would Satan do with a ruined heart? Satan does not come to a ruined heart to approach it, but rather to the sound heart, which is the one Satan comes to in order to corrupt and destroy it. But what is the cure for this issue?
The cure is what the Prophet (peace and blessings be upon him) guided to, which is to seek refuge in Allah by saying, "I seek refuge in Allah from the accursed Satan," and then to turn away from it and not pay attention to it.