Definition
Premeditatio malorum, often translated as the "premeditation of evils" or negative visualization, is a Stoic exercise in which you calmly imagine the setbacks that could befall you — loss of work, illness, the death of someone you love, the failure of a plan.
The aim is not to brood or to manufacture dread. It is to strip misfortune of its power to ambush you. By facing a hardship in thought before it arrives, you arrive at the real event already steady, having rehearsed your response and accepted that such things lie within the order of life.
Why it matters
How it works
The practice is brief and regular. You picture a plausible loss, notice the emotion it raises, and then walk through how a person of good character would respond. The Stoics paired it with the reminder that all externals are borrowed, never owned.
Done well, it produces two effects at once: a sober readiness for hardship and a sharpened appreciation for what is still here. It is preparation, not pessimism — a rehearsal so the real performance is calm.