...in every man there is an eye of the soul, which...is more precious far than ten thousand bodily eyes, for by it alone is truth seen.
PlatoWhen a person supposes that he knows, and does not know; this appears to be the great source of all the errors of the intellect.
PlatoMariner, do not ask whose tomb this may be, but go with good fortune: I wish you a kinder sea.
Plato