Our psychology is ... a science of mere phenomena without any metaphysical implications. [It] Treats all metaphysical claims and assertions as mental phenomena, and regards them as statements about the mind and its structure.

Psychology is an attempt to gain a scientific understanding of human nature. We are all deeply interested in knowing human nature. When we are not talking about ourselves we are usually talking about our neighbors.

Psychology is the science of mental life

Psychology is sometimes called a new science. This is quite wrong. Psychology is, perhaps, the oldest science, and, unfortunately, in its most essential features a forgotten science.

Psychology. The Science of Soul, in days of old: a Science which served as the unavoidable basis for physiology. Whereas in our modern day, it is psychology that is being based (by our great scientists) upon physiology.

In its present state of development psychology must be thought of as a young science. There is only one field in which it is relatively well established and in which it has advanced steadily: this is the psychology of sensation and perception. The scientific character of this field is fully recognized. Its findings are based almost entirely on experimental evidence, and even when its theories are in conflict one feels that as far as method is concerned it stands on relatively firm ground. The situation is different with the psychology of will, of needs, and of personality despite the fact that these fields have always attracted popular interest. As recently as fifteen years ago it was assumed that they, by their very nature, were not amenable to scientific methods. The little experimental work that had been done seemed too artificial and abstract to give an insight into the real processes. It was generally accepted that experimental investigations of these elusive and highly complicated processes were intrinsically impossible, at least in so far as human beings are concerned. Thus in Europe these problems were treated in a half-literary, half-philosophical way, and in America the tendency was to study individual differences by means of tests.

Psychology is the science of the intellects, characters and behavior of animals including man. Human education is concerned with certain changes in the intellects, characters and behavior of men, its problems being roughly included under these four topics: Aims, materials, means and methods.

Physicists take something complicated & make it simpler. Psychologists take something very complicated & make it even more complicated.

Psychology is the science of psychic states both as to content and form, regarded from an objective standpoint, and brought in relation to the living corporeal individual.

Physics and psychology are going somewhere, but where they do not know. But... they are traveling from: Democritan permanent particles and the Cartesian mind necessarily aware. ...they are both traveling away from the same point of origin and in the same general direction: from the isolation of supposedly permanent "substances" towards the identification of changing relations potentially affecting everything; briefly, from substance to changing relations and structures.

Psychology has most often been defined as science of consciousness, but this definition does not go far enough. For consciousness does not occur impersonally. Consciousness, on the contrary, always is a somebody-being-conscious. There is never perception without a somebody who perceives, and there never is thinking unless some one thinks. And this somebody is not an isolated self but a self which is affected from without and which expresses itself in its behavior. In view of these facts psychology is more exactly defined as science of the self in relation to, or conscious of, its environment.

Psychology is a great science, but – there are no psychologists among us at the moment, I believe. It seems to me we're on uncertain ground.' Fara turned to Hardin. 'Didn't you study psychology under Alurin?' Hardin answered, half in reverie: 'Yes, I never completed my studies, though. I got tired of theory. I wanted to be a psychological engineer, but we lacked the facilities, so I did the next best thing – I went into politics. It's practically the same thing.

Psychology is the science of mental life.” William James

The beauty of physics is that it can rigorously predict things nobody has seen before, before the emergence of any empirical evidence. Compare to fraudulent fields like psychology that overfit from naive "empirical evidence" to predict nothing.