What made the war inevitable was the growth of Athenian power and the fear which this caused in Sparta.
ThucydidesSome legislators only wish to vengeance against a particular enemy. Others only look out for themselves. They devote very little time on the consideration of any public issue. They think that no harm will come from their neglect. They act as if it is always the business of somebody else to look after this or that. When this selfish notion is entertained by all, the commonwealth slowly begins to decay.
ThucydidesIf you give way, you will instantly have to meet some greater demand, as having been frightened into obedience in the first instance; while a firm refusal will make them clearly understand that they must treat you more as equals.
ThucydidesIndeed 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
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