Doctors keep their scalpels and other instruments handy, for emergencies. Keep your philosophy ready too - ready to understand heaven and earth. In everything you do, even the smallest thing, remember the chain that links them. Nothing earthly succeeds by ignoring heaven, nothing heavenly by ignoring earth.

A rational nature admits of nothing but what is serviceable to the rest of mankind.

You are making an inopportune rejection of what Nature has given you today, if all your mind is set on what men will say of you tomorrow.

Now departure from the world of men is nothing to fear, if gods exist: because they would not involve you in any harm. If they do not exist, or if they have no care for humankind, then what is life to me in a world devoid of gods, or devoid of providence? But they do exist, and they do care for humankind: and they have put it absolutely in man's power to avoid falling into the true kinds of harm.

Think on this doctrine, - that reasoning beings were created for one another's sake; that to be patient is a branch of justice, and that men sin without intending it.

A man should always have these two rules in readiness. First, to do only what the reason of your ruling and legislating faculties suggest for the service of man. Second, to change your opinion whenever anyone at hand sets you right and unsettles you in an opinion, but this change of opinion should come only because you are persuaded that something is just or to the public advantage, not because it appears pleasant or increases your reputation.

I cannot comprehend how any man can want anything but the truth.