The mercury light doesn't show red. It makes the blood in your skin look blue-black. But see how splendidly it brings out the green in the plants.

I have succeeded in getting my actual work down to thirty minutes a day. That leaves me eighteen hours for engineering.

As for my memory, I have a particularly good one. I never keep any record of my investigations or experiments. My memory files all these things away conveniently and reliably. I should say, though, that I didn’t cumber it up with a lot of useless matter.

The mercury light doesn't show red. It makes the blood in your skin look blue-black. But see how splendidly it brings out the green in the plants.

The most important advance in the next fifty years will be in the realm of the spiritual - dealing with the spirit of thought.

No man really becomes a fool until he stops asking questions.

No evidence or proof of the existence of a God has been found in the phenomena of nature, based on experience.