“ Anybody who has been seriously engaged in scientific work of any kind realizes that over the entrance to the gates of the temple of science are written the words: 'Ye must have faith.' ”

“ It is not the possession of truth, but the success which attends the seeking after it, that enriches the seeker and brings happiness to him. ”

“ Science cannot solve the ultimate mystery of nature. And that is because, in the last analysis, we ourselves are a part of the mystery that we are trying to solve. ”

“ We have no right to assume that any physical laws exist, or if they have existed up until now, that they will continue to exist in a similar manner in the future. ”

“ A scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die and a new generation grows up that is familiar with it. ”

“ Whence come I and whither go I? That is the great unfathomable question, the same for every one of us. Science has no answer to it. ”

“ Scientific discovery and scientific knowledge have been achieved only by those who have gone in pursuit of it without any practical purpose whatsoever in view. ”