Reprove your friend in secret and praise him openly.

One has no right to love or hate anything if one has not acquired a thorough knowledge of its nature. Great love springs from great knowledge of the beloved object, and if you know it but little you will be able to love it only a little or not at all.

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.

Especially learn how to see.

Most men are of naught more use in their lives but as machines for turning food into sh*t.

Small rooms or dwellings discipline the mind, large ones weaken it.

How many emperors and how many princes have lived and died and no record of them remains, and they only sought to gain dominions and riches in order that their fame might be ever-lasting.