There never was a sounder logical maxim of scientific procedure than Ockham's razor: Entia non sunt multiplicanda praeter necessitatem. That is to sa….

The woof and warp of all thought and all research is symbols, and the life of thought and science is the life inherent in symbols; so that it is wron….

Every work of science great enough to be well remembered for a few generations affords some exemplification of the defective state of the art of reas….

The entire universe is perfused with signs, if it is not composed exclusively of signs..

The idea does not belong to the soul; it is the soul that belongs to the idea..

The essence of belief is the establishment of a habit..

My language is the sum total of myself..

The pragmatist knows that doubt is an art which hs to be acquired with difficulty..

Every new concept first comes to the mind in a judgment..

We cannot begin with complete doubt..

All the greatest achievements of mind have been beyond the power of unaided individuals..

Among the minor, yet striking characteristics of mathematics, may be mentioned the fleshless and skeletal build of its propositions; the peculiar dif….

Still, it will sometimes strike a scientific man that the philosophers have been less intent on finding out what the facts are, than on inquiring wha….

A true proposition is a proposition belief which would never lead to such disappointment so long as the proposition is not understood otherwise than ….

... and it is probably that there is some secret here which remains to be discovered..

If an opinion can eventually go to the determination of a practical belief, it, in so far, becomes itself a practical belief; and every proposition t….

There is a kink in my damned brain that prevents me from thinking as other people think..

No general description of the mode of advance of human knowledge can be just which leaves out of account the social aspect of knowledge. That is of i….

Our whole past experience is continually in our consciousness, though most of it sunk to a great depth of dimness. I think of consciousness as a bott….

Whenever a man acts purposively, he acts under a belief in some experimental phenomenon. Consequently, the sum of the experimental phenomena that a p….

True science is distinctively the study of useless things. For the useful things will get studied without the aid of scientific men. To employ these ….