What is my ruling faculty now to me? and of what nature am I now making it? and for what purpose am I now using it? is it void of understanding? is i… - Marcus Aurelius

Everywhere and at all times it is in thy power piously to acquiesce in thy present condition, and to behave justly to those who are about thee, and to exert thy skill upon thy present thoughts, that nothing shall steal into them without being well examined.

Remember that neither the future nor the past pains thee, but only the present. But this is reduced to a very little, if thou only circumscribest it, and chidest thy mind, if it is unable to hold out against even this.

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)