The Prince by Niccolo Machiavelli Chapter 17 Page 5

and yet not hated, and this will be the case so long as he does not meddle with the property or with the women of his citizens and subjects. And if constrained to put any to death, he should do so only when there is manifest cause or reasonable justification. But, above all, he must abstain from the property of others. For men will sooner forget the death of their father than the loss of their patrimony. Moreover, pretexts for confiscation are never to seek, and he who has once begun to live by rapine always finds reasons for taking what is not his; whereas reasons for shedding blood are fewer, and sooner exhausted.

But when a Prince is with his army, and has many soldiers under his command, he must needs disregard the reproach of cruelty, for without such a reputation in its Captain, no army can be held together or kept