10 At last my discourse is clear of the reefs: at last this frail bark has passed from the breakers into deep water. I may now spread my sails to the breeze; and, as I leave the rocks of controversy astern, my epilogue will be like the joyful shout of mariners. O desert, bright with the flowers of Christ! O solitude whence come the stones of which, in the Apocalypse, the city of the great king is built! O wilderness, gladdened with God's special presence! What keeps you in the world, my brother, you who are above the world? How long shall gloomy roofs oppress you?
How long shall smoky cities immure you? Believe me, I have more light than you. Sweet it is to lay aside the weight of the body and to soar into the pure bright ether. Do you dread poverty? Christ calls the poor blessed. Does toil frighten you? No athlete is crowned but in the sweat of his brow. Are you anxious as regards food? Faith fears no famine. Do you dread the bare ground for limbs wasted with fasting? The Lord lies there beside you. Do you recoil from an unwashed head and uncombed hair?
Christ is your true head. Does the boundless solitude of the desert terrify you? In the spirit you may walk always in paradise. Do but turn your thoughts there and you will be no more in the desert. Is your skin rough and scaly because you no longer bathe? He that is once washed in Christ needs not to wash again. To all your objections the apostle gives this one brief answer: “The sufferings of this present time are not worthy to be compared with the glory” which shall come after them, “which shall be revealed in us.” You are too greedy of enjoyment, my brother, if you wish to rejoice with the world here, and to reign with Christ hereafter.
Source: Letters (New Advent)