Stoicism

Wipe out thy imaginations by often saying to thyself: Now it is in my power to let no badness be in this soul, nor desire, nor any perturbation at all; but looking at all things I see what is their nature, and I use each according to its value.—Remember this power which thou hast from nature.

— Meditations 8.29, tr. George Long · Stoic Morning

The Pythagoreans bid us in the morning look to the heavens that we may be reminded of those bodies which continually do the same things and in the same manner perform their work, and also be reminded of their purity and nudity. For there is no veil over a star.

— Meditations 11.27, tr. George Long · Stoic Morning

In the series of things, those which follow are always aptly fitted to those which have gone before: for this series is not like a mere enumeration of disjointed things, which has only a necessary sequence, but it is a rational connection: and as all existing things are arranged together harmoniously, so the things which come into existence exhibit no mere succession, but a certain wonderful relationship (vi. 38; vii. 9; vii. 75, note).

— Meditations 4.45, tr. George Long · Stoic Morning

About death: whether it is a dispersion, or a resolution into atoms, or annihilation, it is either extinction or change.

— Meditations 7.32, tr. George Long · Stoic Morning

Hasten [to examine] thy own ruling faculty and that of the universe and that of thy neighbor: thy own, that thou mayst make it just: and that of the universe, that thou mayst remember of what thou art a part; and that of thy neighbor, that thou mayst know whether he has acted ignorantly or with knowledge, and thou mayst also consider that his ruling faculty is akin to thine.

— Meditations 9.22, tr. George Long · Stoic Morning