Two half philosophers will probably never a whole metaphysician make.

The cleverer I am at miniaturizing the world, the better I possess it.

The characteristic of scientific progress is our knowing that we did not know.

One doesn't read poetry while thinking of other things.

Any work of science, no matter what its point of departure, cannot become fully convincing until it crosses the boundary between the theoretical and the experimental: Experimentation must give way to argument, and argument must have recourse to experimentation.

True poetry is a function of awakening. It awakens us, but it must retain the memory of previous dreams.

The psychology of the alchemist is that of reveries trying to constitute themselves in experiments on the exterior world. A double vocabulary must be established between reverie and experiment. The exaltation of the names of substances is the preamble to experiments on the "exalted" substances.