The theme of remembering, with its twin truth of giving thanks, is inseparable from faith in the Bible. The man or woman of faith is the one who gives thanks. Unbelief, on the other hand, has a short and ungrateful memory.
For doubt–full-grown–is not a lapse of memory, but a willful refusal to remember.
When a person’s doubt is well-developed, it needs a special confrontation, one designed to disturb complacency and strike a blow at self-sufficiency.
—Os Guinness, God in the Dark: The Assurance of Faith Beyond a Shadow of Doubt (pp. 45; 51-52)