Be not another, if you can be yourself.
Know that the philosopher has power over the stars, and not the stars over him.
Everything is a drug; it depends on the dose.
Men who are devoid of the power of spiritual perception are unable to recognize anything that cannot be seen externally.
Man is ill because he is never still.
Since nothing is so secret or hidden that it cannot be revealed, everything depends on the discovery of those things that manifest the hidden.