History of the Peloponnesian War

"For those indeed to go to war, who, while successful in other things, have had a choice in the matter allowed them, it is great folly. But if [in our case] it were necessary, either immediately to submit to our neighbours, if we made concessions, or to preserve our independence by running a great risk;

then he who shrank from the risk is more reprehensible than he who faced it. For my part then, I am the same that I ever was, and do not depart from my opinion; but you are changing, since it happens that you were persuaded [to go to war] while unscathed, but repent of it now you are suffering: and that my advice appears wrong through the weakness of your resolution; because pain is now in possession of each man's feeling, while the certainty of the benefit is as yet hidden from all: and a great reverse having befallen you, and that suddenly, your mind is too prostrated to persevere in your determinations.

For the spirit is enslaved by what is sudden and unlooked for, and most beyond our calculation; which has been your case, in addition to every thing else, more especially with regard to the plague.

Living, however, as you do in a great city, and brought up with habits corresponding to it, you ought to be willing to encounter the greatest misfortunes, and not to sully your reputation; (for men think it equally just to find fault with him who weakly falls short of his proper character, and to hate him who rashly grasps at that which does not belong to him;) and you ought to cease grieving for your private sufferings, and to devote yourselves to the safety of the commonwealth.