Men who are lovers of wisdom [i.e., philosophers] must be inquirers into many things.
For those who are awake, the Cosmos is One.
Our envy always lasts longer than the happiness of those we envy.
The content of your character is your choice. Day by day, what you choose, what you think and what you do is who you become.
Those unmindful when they hear, for all they make of their intelligence, may be regarded as the walking dead.
Those who hear and do not understand are like the deaf. Of them the proverb says: "Present, they are absent."