He who does not know himself does not know God, either. And he who does not know God does not know the truth and the nature of things in general... He who does not know himself continually sins against God and continually moves farther away from Him. He who does not know the nature of things and what they truly are in themselves is powerless to evaluate them according to their worth and to discriminate between the mean and the precious, the worthless and the valuable. Wherefore, such a person wears himself out in the pursuit of vain and trivial things, and is unconcerned about and indifferent to the things that are eternal and most precious.
Saint Nektarios of Aegina
