Old age is but a second childhood.
Let each man exercise the art he knows.
Have you ever, looking up, seen a cloud like to a Centaur, a Part, or a Wolf, or a Bull?
By words the mind is winged.
Even if you persuade me, you won’t persuade me.
Meton (astronomer in 5th century BC): With the straight ruler I set to work To make the circle four-cornered .