Doubt arouses curiosity about the unknown,and curiosity reveals the true nature of the unknown,giving a person confidence and then complete peace of mind regarding it
I believe that doubt in and of itself is bad, but when viewed as a starting point for inquiry and exploration, it brings reassurance—whether one accepts or rejects the thing in question.
I cannot have absolute confidence in something unless I have first doubted it, investigated it,and verified that it is worthy of trust