On the other hand, it is evident that man never attains to a true self-knowledge until he has previously contemplated the face of God, and come down after such contemplation to look into himself…So long as we do not look beyond the earth, we are quite pleased with our own righteousness, wisdom, and virtue; we address ourselves in the most flattering terms, and seem only less than demigods. But should we once begin to raise our thoughts to God, and reflect what kind of Being he is, and how absolute the perfection of what righteousness, and wisdom, and virtue, to which as a standard, we are bound to be conformed, what formerly delighted us by its false show of righteousness, will become polluted with the greatest iniquity; what strangely imposed upon us under the name of wisdom, will disgust by its extreme folly; and what presented the appearance of virtuous energy, will be condemned as the most miserable impotence.
– John Calvin
as quoted by Sproul, R.C.; Grace Unknown: The Heart of Reformed Theology; Baker Books; Grand Rapids, MI; copyright 1997; p. 37