St. Mark the Ascetic, On No Righteousness by Works:

Knowledge of created beings is one thing, and knowledge of the divine truth is another. The second surpasses the first just as the sun outshines the moon.
Knowledge of created beings increases the more we observe the commandments actively; but knowledge of the truth grows the more we hope in Christ.
("Philokalia (Vol. 1)", p. 137, text 144-145)