I was at the foot of my class.

Most of the exercise I get is from standing and walking around laboratory tables all day. I derive more benefit and entertainment from this than some of my friends and competitors get from playing games like golf.

The injurious agent in cigarettes comes principally from the burning paper wrapper. The substance thereby formed is called "acrolein." It has a violent action on the nerve centers, producing degeneration of the cells of the brain, which is quite rapid among boys. Unlike most narcotics, this degeneration is permanent and uncontrollable. I employ no person who smokes cigarettes.

A good idea is never lost. Even though its originator or possessor may die, it will someday be reborn in the mind of another.

Of the 200 light bulbs that didn't work, every failure told me something that I was able to incorporate into the next attempt.

I have far more respect for the person with a single idea who gets there than for the person with a thousand ideas who does nothing.

I have better use for my brain than to poison it with alcohol. To put alcohol in the human brain is like putting sand in the bearings of an engine.