A blazing fire makes flame and brightness out of everything that is thrown into it. - Marcus Aurelius

Because most of what we say and do is not essential. If you can eliminate it, you'll have more time, and more tranquillity. Ask yourself at every moment, “Is this necessary?” But we need to eliminate unnecessary assumptions as well. To eliminate the unnecessary actions that follow. (Hays translation)

The happiness and unhappiness of the rational, social animal depends not on what he feels but on what he does; just as his virtue and vice consist not in feeling but in doing.

Observe always that everything is the result of a change, and get used to thinking that there is nothing Nature loves so well as to change existing forms and to make new ones like them.