Concern for man and his fate must always form the chief interest of all technical endeavors. Never forget this in the midst of your diagrams and equations.

If I were wrong, wouldn't one be enough?

I must seem like an ostrich who forever burries its head in the relativistic sands in order not to face the evil quanta.

Of what significance is one's existence, one is basically unaware. What does a fish know about the water in which he swims all his life? The bitter and the sweet come from outside. The hard from within, from one's own efforts. For the most part I do what my own nature drives me to do. It is embarrassing to earn such respect and love for it.

Try first to be a man of value; success will follow.

A new idea comes suddenly and in a rather intuitive way, but intuition is nothing but the outcome of earlier intellectual experience.

If [quantum theory] is correct, it signifies the end of physics as a science.