Indeed men too often take upon themselves in the prosecution of their revenge to set the example of doing away with those general laws to which all can look for salvation in adversity, instead of allowing them to subsist against the day of danger when their aid may be required
ThucydidesFor we both alike know that into the discussion of human affairs the question of justice enters only where the pressure of necessity is equal, and that the powerful exact what they can, and the weak grant what they must.
ThucydidesSelf-control is the chief element in self-respect, and respect of self, in turn, is the chief element in courage.
Thucydides