Quote by Thucydides
"It is a great thing to know the season for something and when to refrain from it."
More from Thucydides
"The strong do what they can and the weak suffer what they must."
"Ignorance is strength."
"The real evils of life are such as to make people wish for death."
"It is a habit of mankind to entrust to careless hope what they long for, and to use sovereign reason only on questions they have already defined as insoluble."