All of science can be divided into physics and stamp-collecting.

Simplification of modes of proof is not merely an indication of advance in our knowledge of a subject, but is also the surest guarantee of readiness for farther progress.

Symmetrical equations are good in their place, but ' vector ' is a useless survival, or offshoot from quaternions, and has never been of the slightest use to any creature.

The more thoroughly I conduct scientific research, the more I believe that science excludes atheism.

Vortices of pure energy can exist and, if my theories are right, can compose the bodily form of an intelligent species.

The only census of the senses, so far as I am aware, that ever before made them more than five, was the Irishman's reckoning of seven senses. I presume the Irishman's seventh sense was common sense; and I believe that the possession of that virtue by my countrymen-I speak as an Irishman.

Mathematics is the only true metaphysics.