Of course there are days when you don't feel like going to church. Where is God anyway? Why can't I just stay in bed? Please go, no matter how deserted you feel!
Screwtape, a senior devil, writes his nephew, Wormwood, a devil in training: "Our cause is never more in danger than when a human, no longer desiring, but still intending, to do our Enemy's will, looks round upon a universe from which every trace of Him seems to have vanished, and asks why he has been forsaken, and still obeys."
C.S. Lewis The Screwtape Letters
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