" 5. Be ofttimes mindful of the saying,(3) The eye is not satisfied with seeing, nor the ear with hearing. Strive, therefore, to turn away thy heart from the love of the things that are seen, and to set it upon the things that are not seen. For they who follow after their own fleshly lusts, defile the conscience, and destroy the grace of God. "

― Thomas à Kempis , The Imitation of Christ