If you were to make a very honest assessment, you'd have to admit that everyone experiences doubt at some point. But there are two kinds of doubters: sincere doubters and insincere doubters. An insincere doubter doubts and doesn’t want to believe. But a sincere doubter is someone who, even though he doubts, wants to know the truth.

Doubt is a natural disease of the human condition.  And perhaps the person who epitomizes doubt most is Thomas.