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.
ThucydidesFor men can endure to hear others praised only so long as they can severally persuade themselves of their own ability to equal the actions recounted: when this point is passed, envy comes in and with it incredulity.
ThucydidesWars spring from unseen and generally insignificant causes, the first outbreak being often but an explosion of anger.
Thucydides