He who does not punish evil, commands it to be done. - Leonardo da Vinci

There will be many who will eagerly and with great care and solicitude follow up a thing, which, if they only knew its malignity, would always terrify them. Of those men, who, the older they grow, the more avaricious they become, whereas, having but little time to stay, they should become more liberal.

Those who, in debate, appeal to their qualifications, argue from memory, not from understanding.

A bird makes the same use of wings and tail in the air as a swimmer does of his arms and legs in the water.