text: Do you suppose that I shall write you how kindly the winter season has dealt with us, – a short season and a mild one, – or what a nasty spring we are having, – cold weather out of season, – and all the other trivialities which people write when they are at a loss for topics of conversation? No; I shall communicate something which may help both you and myself. And what shall this "something" be, if not an exhortation to soundness of mind? Do you ask what is the foundation of a sound mind? It is, not to find joy in useless things. I said that it was the foundation; it is really the pinnacle. We have reached the heights if we know what it is that we find joy in and if we have not placed our happiness in the control of externals. The man who is goaded ahead by hope of anything, though it be within reach, though it be easy of access, and though his ambitions have never played him false, is troubled and unsure of himself. Above all, my dear Lucilius, make this your business: learn how to feel joy.