Never let the future disturb you. You will meet it, if you have to, with the same weapons of reason which today arm you against the present.

When a guide meets up with someone who is lost, ordinarily his reaction is to direct him on the right path, not mock or malign him, then turn on his heel and walk away. As for you, lead someone to the truth and you will find that he can follow.

What am I but a little flesh, a little breath, and the thinking part that rules the whole?

To a rational being it is the same thing to act according to nature and according to reason.

Blot out vain pomp; check impulse; quench appetite; keep reason under its own control.