As far as you can, get into the habit of asking yourself in relation to any action taken by another: "What is his point of reference here?" But begin with yourself: examine yourself first.

Such as are thy habitual thoughts, such also will be the character of thy mind; for the soul is dyed by the thoughts.

Frequently consider the connection of all things in the universe. .. We should not say 'I am an Athenian' or 'I am a Roman' but 'I am a citizen of the Universe.

And can anything else that is useful be accomplished without change? Do you not see then that for yourself also to change is just the same, and equally necessary for the universal nature?

Whatever anyone does or says, I must be emerald and keep my colour.

Time is a sort of river of passing events, and strong is its current; no sooner is a thing brought to sight than it is swept by and another takes its place, and this too will be swept away.

The wise man sees in the misfortune of others what he should avoid.