All things change, and you yourself are constantly wasting away. So also is the universe.

...the sole thing of which any man can be deprived is the present; since this is all he owns, and nobody can lose what is not his.

Enter others' minds and let them enter yours.

When we consider we are bound to be serviceable to mankind, and bear with their faults, we shall perceive there is a common tie of nature and relation between us.

Keep yourself simple, good, pure, serious, and unassuming; the friend of justice and godliness; kindly, affectionate, and resolute in your devotion to duty.

Hast thou reason? I have. Why then dost not thou use it? For if this does its own work, what else dost thou wish?

Look well into thyself; there is a source of strength which will always spring up if thou wilt always look.