Courage and wisdom are, indeed, rarities amongst men, but of all that is good, a just man it would seem is the most scarce.
PlutarchFor it was not so much that by means of words I came to a complete understanding of things, as that from things I somehow had an experience which enabled me to follow the meaning of words.
PlutarchTo make no mistakes is not in the power of man; but from their errors and mistakes the wise and good learn wisdom for the future.
Plutarch