For the Stoics, then, our judgments about the world are all that we can control, but also all that we need to control in order to be happy; tranquility results from replacing our irrational judgments with rational ones. And dwelling on the worst-case scenario, the ‘premeditation of evils’, is often the best way to achieve this – even to the point, Seneca suggests, of deliberately experiencing those ‘evils’, so as to grasp that they might not be as bad as you’d irrationally feared.
