“Living on earth is truly a misery. The more a man desires spiritual life, the more bitter the present becomes to him, because he understands better and sees more clearly the defects, the corruption of human nature. To eat and drink, to watch and sleep, to rest, to labor, and to be bound by other human necessities is certainly a great misery and affliction to the devout man, who would gladly be released from them and be free from all sin. Truly, the inner man is greatly burdened in this world by the necessities of the body, and for this reason the Prophet prayed that he might be as free from them as possible, when he said: “From my necessities, O Lord, deliver me.”
But woe to those who know not their own misery, and greater woe to those who love this miserable and corruptible life. Some, indeed, can scarcely procure its necessities either by work or by begging; yet they love it so much that, if they could live here always, they would care nothing for the kingdom of God.
How foolish and faithless of heart are those who are so engrossed in earthly things as to relish nothing but what is carnal! Miserable men indeed, for in the end they will see to their sorrow how cheap and worthless was the thing they loved.
The saints of God and all devout friends of Christ did not look to what pleases the body nor to the things that are popular from time to time. Their whole hope and aim centered on the everlasting good. Their whole desire pointed upward to the lasting and invisible realm, lest the love of what is visible drag them down to lower things.
Do not lose heart, then, my brother, in pursuing your spiritual life. There is yet time, and your hour is not past. Why delay your purpose? Arise! Begin at once and say: ‘Now is the time to act, now is the time to fight, now is the proper time to amend.'”
The Imitation of Christ, Thomas a Kempis, 14th century