Shall I show you the sinews of a philosopher? What sinews are those? - A will undisappointed; evils avoided; powers daily exercised; careful resolutions; unerring decisions.

No man is disturbed by things, but by his opinion about things.

As you think, so you become.....Our busy minds are forever jumping to conclusions, manufacturing and interpreting signs that aren't there.

No man is free who is not master of himself.

When we blather about trivial things, we ourselves become trivial, for our attention gets taken up with trivialities. You become what you give your attention to.

Man is not worried by real problems so much as by his imagined anxieties about real problems

Have the wisdom to know what cannot be changed, and the strength to change what can.