that its people knew neither how to give nor receive a benefit, and that of all the vices to which Rome’s citizens fell prey, none were as significant as ingratitude. He said that amongst “homicides, tyrants, thieves, adulterers, ravishers, sacrilegious, traitors,” there was nothing “worse than the ungrateful man.” He explained that many of those c

To develop this way of thinking, a form of the Stoic practice of negative visualization can help.