A traveler without knowledge is a bird without wings.
If thou art wise, incline to truth; for truth, not the semblance, remains in its place.
Virtue is in the mind, not in the appearance.
God preserve us! If men knew what is done in secret, no one would be free from the interference of others.
However much you study, you cannot know without action. A donkey laden with books is neither an intellectual nor a wise man. Empty of essence, what learning has he whether upon him is firewood or book?
If a piece of worthless stone can bruise a cup of gold, its worth is not increased, nor that of the gold diminished.