History of the Peloponnesian War

As for the Camarinaean, who says that it is the Syracusan, not he, that is the enemy of the Athenian, and who thinks it hard to have to encounter risk in behalf of my country, I would have him bear in mind that he will fight in my country, not more for mine than for his own, and by so much the more safely in that he will enter on the struggle not alone, after the way has been cleared by my ruin, but with me as his ally; and that the object of the Athenian is not so much to punish the enmity of the Syracusan as to use me as a blind to secure the friendship of the Camarinaean.

As for him who envies or even fears us (and envied and feared great powers must always be), and who on this account wishes Syracuse to be humbled to teach us a lesson, but would still have her survive in the interest of his own security, the wish that he indulges is not humanly possible. A man can control his own desires, but he cannot likewise control circumstances.