The color of the object illuminated partakes of the color of that which illuminates it.

If you are alone you belong entirely to yourself. If you are accompanied by even one companion you belong only half to yourself or even less in proportion to the thoughtlessness of his conduct and if you have more than one companion you will fall more deeply into the same plight.

O time! swift devourer of all created things!

O speculators about perpetual motion, how many vain chimeras have you created in the like quest? Go and take your place with the seekers after gold.

Just as a well-filled day brings blessed sleep, so a well-employed life brings a blessed death.

Who sows virtue ought to reap honour.

It is a far worthier thing to read by the light of experience than to adorn oneself with the labors of others.