Letters 76.34

If an evil has been pondered beforehand, the blow is gentle when it comes. To the fool, however, and to him who trusts in fortune, each event as it arrives “comes in a new and sudden form,” and a large part of evil, to the inexperienced, consists in its novelty. This is proved by the fact that men endure with greater courage, when they have once become accustomed to them, the things which they had at first regarded as hardships.

Seneca, Letters to Lucilius 76.34, translated by Richard Mott Gummere