"Most powerful is he who has himself in his own power."
"Freedom is not procured by a full enjoyment of what is desired, but by controlling the desire."
"People who know no self-restraint lead stormy and disordered lives, passing their time in a state of fear commensurate with the injuries they do to others, never able to relax."
"Restrict yourself to choice and refusal; and exercise them carefully, with discipline and detachment."
"All philosophy lies in two words, sustain and abstain."
"We should not trust the masses who say only the free can be educated, but rather the lovers of wisdom who say that only the educated are free."