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

Agreements about what is good or not, are usually not worth much. It is very much like art, is it not an art to lead a good life?

Older men start wars, but younger men fight them.

The most beautiful thing we can experience is the mysterious. It is the source of all true art and science.

The great need to grasp principles had caused me to spend most of my time on fruitless persuits.

Do you believe in miracles? Well, you should. In fact, life itself is a big miracle. There are so many things that are beyond our understanding. There are two ways to live: you can live as if nothing is a miracle; you can live as if everything is a miracle.

In one's youth every person and every event appear to be unique. With age one becomes much more aware that similar events recur. Later on, one is less often delighted or surprised, but also less disappointed than in earlier years.