Wherefore then doth Christ thus reply to him, saying, "There is none good?" Because He came unto Him as a mere man, and one of the common sort, and a Jewish teacher; for this cause then as a man He discourses with him. And indeed in many instances He replies to the secret thoughts of them that come unto Him.
-St. John Chrysostom, Homily 63 on Matthew 19, 4th Century
Spiritual delight is not enjoyment found in things that exists outside the soul.
-St. Isaac of Syria, Unknown, 7th century