Were you to live three thousand years, or even thirty thousand, remember that the sole life which a man can lose is that which he is living at the moment; and furthermore, that he can have no other life except the one he loses.

If souls continue to exist, how does the air contain them from eternity?

Begin - to begin is half the work, let half still remain; again begin this, and thou wilt have finished.

Suppose that men kill thee, cut thee in pieces, curse thee, what can these things do to prevent thy mind from remaining pure, wise, sober, just?

Consider frequently the connection of all things in the universe and their relation to one another. For things are somehow implicated with one another, and all in a way friendly to one another.

I, who have never willfully pained another, have no business to pain myself.

Always follow these two rules: first, act only on what your reasoning mind proposes for the good of humanity, and second, change your opinion if someone shows you it's wrong. This change of mind must proceed only from the conviction that it's both correct and for the common good, but not because it will give you pleasure and make you popular.