"The dark night of the soul is not an evil to be endured; it's a good for which we should be grateful.  Of course, it doesn't always seem that way.  The thought of plunging into a spiritual abyss and losing all the sweetness in our relationship with God strikes few as appealing.  But neither does...

Create in me a clean heart, O God; and renew a right spirit within me. Psalm 51:10