"The emptiness of the heart - which has deprived itself of real delight in the One who is everything - generates a thirst for many and various false pleasures: the searching and striving for those innumerable things in which one hopes to find sensory pleasure, both inwardly and outwardly."
- St. Theophan the Recluse, Turning the Heart to God, p.6 (published separately, this is the second part of The Path to Salvation).