There is no need to suppose that human beings differ very much one from another; but it is true that the ones who come out on top are the ones who have been trained in the hardest school.
ThucydidesWe must remember that one man is much the same as another, and that he is best who is trained in the severest school.
ThucydidesPeople get into the habit of entrusting the things they desire to wishful thinking, and subjecting things they don't desire to exhaustive thinking
ThucydidesYou can now, if you choose, employ your present success to advantage, so as to keep what you have got and gain honour and reputation besides, and you can avoid the mistake of those who meet with an extraordinary piece of good fortune, and are led on by hope to grasp continually at something further, through having already succeeded without expecting it.
Thucydides