Your empire is now like a tyranny: it may have been wrong to take it; it is certainly dangerous to let it go. - Thucydides

I am more afraid of our own blunders than of the enemy's devices.

[H]is (Archidamus) reputation was most affected by his halt at Oenoè. For the Athenians employed the interval in getting away their property; and the Peloponnesians fancied that, if they had advanced quickly and he had not lingered, they could have seized everything before it was conveyed within the walls.

Such were the feelings entertained towards Archidamus by his troops during the halt. He is said to have held back in the belief that the Athenians, while their lands were still unravaged, would yield, and that the thought of allowing them to be devastated would be too much for them.

(Book 2 Chapter 18.3-5)

Revolution thus ran its course from city to city, and the places which it arrived at last, from having heard what had been done before, carried to a still greater excess the refinement of their inventions, as manifested in the cunning of their enterprises and the atrocity of their reprisals. Words had to change their ordinary meaning and to take that which was now given them. Reckless audacity came to be considered the courage of a loyal supporter; prudent hesitation, specious cowardice; moderation was held to be a cloak for unmanliness; ability to see all sides of a question incapacity to act on any. Frantic violence became the attribute of manliness; cautious plotting a justifiable means of self-defense. The advocate of extreme measures was always trustworthy; his opponent a man to be suspected. To succeed in a plot was to have a shrewd head, to divine a plot still shrewder; but to try to provide against having to do either was to break up your party and to be afraid of your adversaries.