Seneca

"Many pursue no fixed goal, but are tossed about by ever changing designs by a fickleness which is shifting in constant and never satisfied with itself."

"It is a rough road that leads to the height of greatness."

"Greed's worst point is its ingratitude."

"The greatest blessings of mankind are within us and within our reach. A wise man is content with his lot, whatever it may be, without wishing for what he has not."