Seneca · On practising what you preach
Letters 20.13
I hold it essential, therefore, to do as I have told you in a letter that great men have often done: to reserve a few days in which we may prepare ourselves for real poverty by means of fancied poverty. There is all the more reason for doing this, because we have been steeped in luxury and regard all duties as hard and onerous. Rather let the soul be roused from its sleep and be prodded, and let it be reminded that nature has prescribed very little for us. No man is born rich. Every man, when he first sees light, is commanded to be content with milk and rags. Such is our beginning, and yet kingdoms are all too small for us! Farewell.
Seneca, Letters to Lucilius 20.13, translated by Richard Mott Gummere