“I believe that ideas such as absolute certitude, absolute exactness, final truth, etc. are figments of the imagination which should not be admissible in any field of science... This loosening of thinking seems to me to be the greatest blessing which modern science has given to us. For the belief in a single truth and in being the possessor thereof is the root cause of all evil in the world.”

“The belief that there is only one truth and that oneself is in possession of it seems to me the root of all the evil that is in the world”

“There are two objectionable types of believers: those who believe the far-fetched, and those who believe that 'belief' must be discarded and replaced by the 'scientific method.' Between these two extremes there is enough scope for believing the reasonable and reasoning on sound beliefs.”

“We have sought for firm ground and found none. The deeper we penetrate, the more restless becomes the universe; all is rushing about and vibrating in a wild dance.”

“I am now convinced that theoretical physics is actual philosophy.”

“Physics as we know it will be over in six months.”

“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.”