Psalm 95:7-9
Today, if you hear his voice, do not harden your hearts, as at Meribah, as on the day at Massah in the wilderness, when your fathers put me to the test and put me to the proof, though they had seen my work.

Satan tells me I am unworthy. But I always was unworthy, and yet you have long loved me. So my unworthiness cannot stop me from having fellowship with you now.
Charles Spurgeon