We can rest contentedly in our sins and in our stupidities, and everyone who has watched gluttons shoveling down the most exquisite foods as if they did not know what they were eating, will admit that we can ignore even pleasure. But pain insists upon being attended to. God whispers to us in our pleasures, speaks in our consciences, but shouts in our pains. It is his megaphone to rouse a deaf world.

C. S. Lewis, The Problem of Pain