The universe is change; our life is what our thoughts make it.

By a tranquil mind I mean nothing else than a mind well ordered.

Never esteem anything as of advantage to you that will make you break your word or lose your self-respect.

You will find rest from vain fancies if you perform every act in life as though it were your last.

If you are distressed by anything external, the pain is not due to the thing itself, but to your estimate of it; and this you have the power to revoke at any moment.