I know of nothing more terrible than the poor creatures who have learned too much. Instead of the sound powerful judgement which would probably have ….

Scientists must use the simplest means of arriving at their results and exclude everything not perceived by the senses..

The plain man is familiar with blindness and deafness, and knows from his everyday experience that the look of things is influenced by his senses; bu….

Strange as it may sound, the power of mathematics rests on its evasion of all unnecessary thought and on its wonderful saving of mental operations..

The ego is as little absolutely permanent as are bodies..

Man is pre-eminently endowed with the power of voluntarily and consciously determining his own point of view..

I can accept the theory of relativity as little as I can accept the existence of atoms and other such dogmas..

A colour is a physical object as soon as we consider its dependence, for instance, upon its luminous source, upon other colours, upon temperatures, u….

Science is the most complete presentment of facts with the least expenditure of thought.

The fact is, every thinker, every philosopher, the moment he is forced to abandon his one-sided intellectual occupation by practical necessity, immed….

Science always has its origin in the adaptation of thought to some definite field of experience..

Personally, people know themselves very poorly..

Science itself, therefore, may be regarded as a minimal problem, consisting of the completest possible presentment of facts with the least possible e….

To us investigators, the concept 'soul' is irrelevant and a matter for laughter. But matter is an abstraction of exactly the same kind, just as good ….

My table is now brightly, now dimly lighted. Its temperature varies. It may receive an ink stain. One of its legs may be broken. It may be repaired, ….

If our dreams were more regular, more connected, more stable, they would also have more practical importance for us..

Many an article that I myself penned twenty years ago impresses me now as something quite foreign to myself..

The acquisition of the most elementary truth does not devolve upon the individual alone: it is pre-effected in the development of the race..

Physics is experience, arranged in economical order..

Thing, body, matter, are nothing apart from the combinations of the elements, - the colours, sounds, and so forth - nothing apart from their so-calle….

The history of the development of mechanics is quite indispensable to a full comprehension of the science in its present condition. It also affords a….