James 4:8:

Draw nigh to God, and he will draw nigh to you.  Cleanse your hands, ye sinners; and purify your hearts, ye double minded.

See also:

If You Blow It
The Insecure Preacher
What 1 John 1:9 Really Means
Objection: God Uses Sickness to Draw Us Closer to Himself
Mistake: Reading Stupid Books