"Until computers and robots make quantum advances, they basically remain adding machines: capable only of doing things in which all the variables are controlled and predictable." - Michio Kaku

"The doctrine that the world is made up of objects whose existence is independent of human consciousness turns out to be in conflict with quantum mechanics and with facts established by experiment." - Bernard d'Espagnat

“Every new idea takes a generation or two until it becomes obvious that there’s no real problem. It has not yet become obvious to me that there’s no real problem (in quantum). I cannot define the real problem, therefore I suspect there’s none, but I’m not sure.” - Richard Feynman

"We may not understand quantum theory (heaven knows, I don’t), but a theory that predicts the real world to ten decimal places cannot in any straightforward sense be wrong.” - Richard Dawkins

“Nature is one. It is not divided into physics, chemistry, quantum mechanics.” - Albert Szent-Gyorgyi

“I cannot seriously believe in quantum theory because the theory cannot be reconciled with the idea that physics should represent a reality in time and space, free from spooky actions at a distance.” - Albert Einstein

“If we look at the way the universe behaves, quantum mechanics gives us fundamental, unavoidable indeterminacy, so that alternative histories of the universe can be assigned probability.” - Murray Gell-Mann

“At the heart of quantum mechanics is a rule that sometimes governs politicians or CEOs - as long as no one is watching, anything goes.” - Lawrence M. Krauss

“Quantum mechanics is certainly imposing. But an inner voice tells me that this is not yet the real thing. The theory says a lot, but does not bring us any closer to the secrets of the “Old One.” I, at any rate, am convinced that He is not playing at dice.” - Albert Einstein

“Quantum theory was split up into dialects. Different people describe the same experiences in remarkably different languages. Even physicists are confused.” - David Finkelstein

“It is often stated that of all the theories proposed in this century, the silliest is quantum theory. In fact, some say that the only thing that quantum theory has going for it is that it is unquestionably correct.” - Michio Kaku

“The Quantum Universe has a quotation from me in every chapter – but it’s a damn good book anyway.” - Richard P. Feynman

“Everything we call real is made of things that cannot be regarded as real.” - Niels Bohr

"In the beginning there were only probabilities. The universe could only come into existence if someone observed it. It does not matter that the observers turned up several billion years later. The universe exists because we are aware of it." - Martin Rees

"Observations not only disturb what is to be measured, they produce it." - Pascual Jordan

"If quantum mechanics hasn't profoundly shocked you, you haven't understood it yet." - Niels Bohr

"I do not like it, and I am sorry I ever had anything to do with it." - Erwin Schrodinger on quantum physics.

"The unification of cosmos and quantum is surely among science's great 'open frontiers.' These are parts of the intellectual map where we're still groping for the truth - where, like ancient cartographers, we must still inscribe 'here be dragons.'" - Martin Rees

“Quantum physics thus reveals a basic oneness of the universe.” - Erwin Schrodinger

"We are analog beings living in a digital world, facing a quantum future." - Neil Turok