A

The manual says to insert disk three, but only two will fit.

(c.388-c.311 BC), Greek playwright

Two things only a man cannot hide: that he is drunk and that he is in love.

"Quod omne animal post coitum est triste."

"Every animal is sad after a copulation."

(384—322 B.C.)

It is unbecoming for young men to utter maxims.

(384—322 B.C.), Greek philosopher

My friends! There are no friends.

(1908—1970), French dramatist

The only thing to know is how to use your neuroses.

(1920 — 1992)

American (Russian-born) biochemist, author, science fiction novelist, popularizer of science, and scholar.

Wrote short stories.

Developed Three Laws of Robotics.

Coined words "robotics" and "positronic".

(1826—1903)

U.S. humorist

I joined the army, and succeeded in killing about as many of the enemy as they of me.

(but H.H. Munro, better known as Saki, also said, "A little inaccuracy sometimes saves tons of explanation." in The Square Egg in 1924, so somebody's stealing something...)

A little inaccuracy saves a world of explanation.

(1930--)

English novelist

If you can't be a good example, then you'll just have to be a horrible warning.