Does “the sleep of reason produce monsters” always or are there ever benign delusions? If so, what are some? If not, why not?

Truth is within you

There are happy dreams that point the way to love and knowledge.

Publius

Reason (much less evidence) does not lead to atheism, dear one. There is no way to know there is no God, much less prove it. Belief in God is not a delusion, but many dogmata of the sects are.