72 The one life, then, is on the open arena, the other hidden as in a cave; the one is opposed to the confusion of the world, the other to the desires of the flesh; the one subdues, the other shuns the pleasures of the body; the one was more agreeable, the other more safe; the one ruling, the other restraining itself, in order to be wholly Christ's, for to the perfect it is said: “He who will come after Me, let him deny himself, and take up his cross and follow Me.” Now he follows Christ who is able to say: “It is no longer I that live, but Christ lives in me.”
Source: Letters (New Advent)