“The psycho-physiological hypothesis is both inductively and deductively the sine qua non of the science of psychology.”

Suggestibility varies as the amount of disaggregation, and inversely as the unification of consciousness.

If society is to progress on a truly humanistic basis, without being subject to mental epidemics and virulent social diseases to which the subconscious falls an easy victim, the personal consciousness of every individual should be cultivated to the highest degree possible.

Human institutions depend for their existence and stability on the impulse of self-preservation and its close associate, – the fear instinct.

Science is the description of phenomena and the formulation of their relations.

We see what we want to see, and observation conforms to hypothesis.

I do not yet want to form a hypothesis to test, because as soon as you make a hypothesis, you become prejudiced.

But I should be very sorry if an interpretation founded on a most conjectural scientific hypothesis were to get fastened to the text in Genesis…

The rate of change of scientific hypothesis is naturally much more rapid than that of Biblical interpretations, so that if an interpretation is founded on such an hypothesis, it may help to keep the hypothesis above ground long after it ought to be buried and forgotten.

The whole edifice of modern physics is built up on the fundamental hypothesis of the atomic or molecular constitution of matter.

Is evolution a theory, a system, or an hypothesis? It is much more: it is a general condition to which all theories, all hypotheses, all systems must bow and which they must satisfy henceforward if they are to be thinkable and true.

We know that communism is the right hypothesis.

But if you consider how abnormal their behavior is, then you are led to the hypothesis that almost all men are suffering from ‘testosterone poisoning.’