The pagan, or rational, virtues are such things as justice and temperance, and Christianity has adopted them. The three mystical virtues which Christianity has not adopted, but invented, are faith, hope and charity. Now… the first evident fact, I say, is that the pagan virtues, such as justice and temperance, are the sad virtues, and that the mystical virtues of faith, hope, and charity are the gay and exuberant virtues. And the second evident fact, which is even more evident, is the fact that the pagan virtues are the reasonable virtues, and that the Christian virtues of faith, hope, and charity are in their essence as unreasonable as they can be…charity means pardoning what is unpardonable, or it is no virtue at all. Hope means hoping when things are hopeless, or it is no virtue at all. And faith means believing the incredible, or it is no virtue at all.
~ G.k. Chesterton