The wireless telegraph is not difficult to understand. The ordinary telegraph is like a very long cat. You pull the tail in New York, and it meows in Los Angeles. The wireless is the same, only without the cat.

(Reply on what constitutes scientific proof:)"The question is much too difficult for me.

Insofar as we may at all claim that slavery has been abolished today, we owe its abolition to the practical consequences of science

The world as we have created it is a process of our thinking. It cannot be changed without changing our thinking.

The more I learn of physics, the more I am drawn to metaphysics.

Why is it that no one understands me and everybody likes me

The only way to escape the personal corruption of praise is to go on working. One is tempted to stop and listen to it. The only thing is to turn away and go on working. Work. There is nothing else.