You see, wire telegraph is a kind of a very, very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? And radio operates exactly the same way: you send signals here, they receive them there. The only difference is that there is no cat.

Time has no independent existence apart from the order of events by which we measure it.

At least once a day, allow yourself the freedom to think and dream for yourself.

I can understand your aversion to the use of the term 'religion' to describe an emotional and psychological attitude which shows itself most clearly in Spinoza... I have not found a better expression than 'religious' for the trust in the rational nature of reality that is, at least to a certain extent, accessible to human reason.

To my mind, to kill in war is not a whit better than to commit ordinary murder.

Truly novel inventions emerge only in one's youth. Later one becomes ever more experienced, famous-and foolish.

Given the millions of billions of Earth-like planets, life elsewhere in the Universe without a doubt, does exist. In the vastness of the Universe we are not alone.