Men of Athens, will you send your sons to contest the monster, Philip? Or have you grown so fat and happy that you care not, and instead dispatch hired troops, who are not of our blood or kin? Will these mercenaries, who fight only for profit, possess the will to hold Philip back? Or will the day come when we awake to discover that we have ceded future liberty to current ease? - Demosthenes

The Warrior Ethos, by Steven Pressfield - https://www.amazon.com/Warrior-Ethos-Steven-Pressfield/dp/193689100X