The belief that there is only one truth, and that oneself is in possession of it, is the root of all evil in the world.

I believe there is no philosophical high-road in science, with epistemological signposts. No, we are in a jungle and find our way by trial and error, building our road behind us as we proceed. We do not find signposts at crossroads, but our own scouts erect them, to help the rest.

Einstein would be one of the greatest theoretical physicists of all time even if he had not written a single line on relativity.

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.

There are two objectionable types of believers: those who believe the incredible and those who believe that ‘belief’ must be discarded and replaced by ’the scientific method.

My advice to those who which to learn the art of scientific prophesy is not to rely on abstract reason, but to decipher the secret language of Nature from Nature’s documents: the facts of experience.

I believe there is no philosophical high-road in science, with epistemological signposts. No, we are in a jungle and find our way by trial and error, building our road behind us as we proceed.

Those who say that the study of science makes a man an atheist, must be rather silly people.

I have tried to read philosophers of all ages and have found many illuminating ideas but no steady progress toward deeper knowledge and understanding. Science, however, gives me the feeling of steady progress: I am convinced that theoretical physics is actual philosophy. It has revolutionized fundamental concepts, e.g., about space and time (relativity), about causality (quantum theory), and about substance and matter (atomistics), and it has taught us new methods of thinking (complementarity) which are applicable far beyond physics.

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