You can’t say A is made of B or vice versa. All mass is interaction.

But there is nothing in biology yet found that indicates the inevitability of death.

Agnostic for me would be trying to weasel out and sound a little nicer than I am about this.

From a long view of the history of mankind the most significant event of the nineteenth century will be judged as Maxwell's discovery of the laws of electrodynamics.

It doesn't matter how beautiful your theory is, it doesn't matter how smart you are. If it doesn't agree with experiment, it's wrong.

The unanswerable mysteries... the attitude that all is uncertain... to summarize it - the humility of the intellect.

My friends and I had taken dancing lessons, although none of us would ever admit it. In those depression days, a friend of my mother was trying to make a living by teaching dancing in the evening, in an upstairs dance studio. There was a back door to the place, and she arranged it so the young men could come up through the back way without being seen.