Seneca · On the value of retirement
Letters 36.12
One word more, and then I shall stop; infants, and boys, and those who have gone mad, have no fear of death, and it is most shameful if reason cannot afford us that peace of mind to which they have been brought by their folly. Farewell.
Seneca, Letters to Lucilius 36.12, translated by Richard Mott Gummere