"There can never be any real opposition between religion and science; for the one is the complement of the other. Every serious and reflective person realizes, I think, that the religious element in hi…"

"The highest court is in the end one's own conscience and conviction—that goes for you and for Einstein and every other physicist—and before any science there is first of all belief. For me, it is beli…"

"The development of a new idea is an act of creation."

"The highest goal of all science is to understand the human mind."

"I started from the assumption that the energy of an oscillator is quantized. I did this in an act of desperation."