If, at some point in your life, you should come across anything better than justice, honesty, self-control, courage – than a mind satisfied that is has succeeded in enabling you to act rationally, and satisfied to accept what’s beyond its control – if you find anything better than that, embrace it without reservations – it must be an extraordinary thing indeed – and enjoy it to the full.
You can discard most of the junk that clutters your mind – things that exist only there – and clear out space for yourself: by comprehending the scale of the world, by contemplating infinite time, by thinking of the speed with which things change – each part of every thing; the narrow space between our birth and death; the infinite time before; the equality unbounded time that follows.
If you seek tranquility, do less. Or do what’s essential – what the logos of a social being requires, and in the requisite way. Which brings a double satisfaction: to do less, better. Because most of what we say and do is not essential. If you can eliminate it, you’ll have more time, and more tranquility. Ask yourself at every moment, ‘Is this necessary?’
Don’t waste the rest of your time here worrying about other people – unless it affects the common good. It will keep you from doing anything useful. You’ll be too preoccupied with what so-and-so is doing, and why, and what the’re saying, and what they’re thinking, and what they’re up to, and all the other things that throw you off and keep you from focusing on your own mind.