Of course this is excellent sense. Don’t put your goods in a leaky vessel. Don’t spend too much on a house you may be turned out of. And there is no man alive who responds more naturally than I to such canny maxims. I am a safety-first creature. Of all arguments against love none makes so strong an appeal to my nature as “Careful! This might lead you to suffering.”
To my nature, my temperament, yes. Not to my conscience. When I respond to that appeal I seem to myself to be a thousand miles away from Christ. If I am sure of anything I am sure that His teaching was never meant to confirm my congenital preference for safe investments and limited liabilities. I doubt whether there is anything in me that pleases Him less. And who could conceivably begin to love God on such a prudential ground—because the security (so to speak) is better? Who could even include it among the grounds for loving? Would you choose a wife or a Friend—if it comes to that, would you choose a dog—in this spirit? One must be outside the world of love, of all loves, before one thus calculates. Eros, lawless Eros, preferring the Beloved to happiness, is more like Love himself than this.
C.S. Lewis, The Four Loves (1960; Harcourt Brace: 1991) 120-121.