When God feels distant, he may be calling us away from a soft, flimsy faith into a tough, unshakable allegiance to Jesus. ~ Piper
Doubt is in the mind: unbelief is in the heart.
Doubt is the searching heart; unbelief is the hardened heart.
Doubt says I want to believe; unbelief says I will not believe.
Christian, your salvation is held together by an unbreakable cord of three strands:
The Father planned it.
The Son purchased it.
The Spirit preserves it.