Doubt is to be avoided. Some modern Christian authors extol the virtues of doubt, but I find none in the Bible.
Keep out the doubt.
Doubt is anti-faith (Matt 14:31; Luke 24:38).
Doubt is a drag on faith (James 1:6-8 in the context of James 1:2-8).
Doubt is a sign of double-mindedness, which is also condemned in Scripture (James 1:6-8; 4:8; Ps 119:113).
Jesus questioned those who doubted (Matt 14:31; Luke 24:38).
The Duty of a Man 