Arithmetic is where the answer is right and everything is nice and you can look out of the window and see the blue sky — or the answer is wrong and you have to start over and try again and see how it comes out this time.

—Carl Sandburg *(1878–1967) American Biographer, Novelist, Socialist*

But how is one to make a scientist understand that there is something unalterably deranged about differential calculus, quantum theory, or the obscene and so inanely liturgical ordeals of the precession of the equinoxes.

—Antonin Artaud *(1896–1948) French Actor, Drama Theorist*

If a man’s wit be wandering, let him study the mathematics.

—Francis Bacon *(1561–1626) English Philosopher*

It is amusing to discover, in the twentieth century, that the quarrels between two lovers, two mathematicians, two nations, two economic systems, usually assumed insoluble in a finite period should exhibit one mechanism, the semantic mechanism of identification — the discovery of which makes universal agreement possible, in mathematics and in life.

—Alfred Korzybski *(1879–1950) Polish-American Scientist, Philosopher of Language*

All science requires mathematics. The knowledge of mathematical things is almost innate in us. This is the easiest of sciences, a fact which is obvious in that no one’s brain rejects it; for laymen and people who are utterly illiterate know how to count and reckon.

—Roger Bacon *(1214–94) English Philosopher, Scientist*