The principle is this: that in everything worth having, even in every pleasure, there is a point of pain and tedium that must be survived, so that the pleasure may revive and endure. The joy of battle comes after the first fear of death; the joy of reading Virgil comes after the bore of learning him; the glow of the seabather comes after the icy shok of the sea bath.
G.K. Chesterton, What's Wrong with the World
pain, pleasure