Letters 107.4

Everyone approaches courageously a danger which he has prepared himself to meet long before, and withstands even hardships if he has previously practised how to meet them. But, contrariwise, the unprepared are panic-stricken even at the most trifling things. We must see to it that nothing shall come upon us unforeseen. And since things are all the more serious when they are unfamiliar, continual reflection will give you the power, no matter what the evil may be, not to play the unschooled boy.

Seneca, Letters to Lucilius 107.4, translated by Richard Mott Gummere