Instinct perfected is a faculty of using and even constructing organized instruments; intelligence perfected is the faculty of making and using unorganized instruments.

Is it astonishing that, like children trying to catch smoke by closing their hands, philosophers so often see the object they would grasp fly before them?

The emotion felt by a man in the presence of nature certainly counts for something in the origin of religions.

All the living hold together, and all yield to the same tremendous push. The animal takes its stand on the plant, man bestrides animality, and the whole of humanity, in space and in time, is one immense army galloping beside and before and behind each of us in an overwhelming charge able to beat down every resistance and clear the most formidable obstacles, perhaps even death.

Life does not proceed by the association and addition of elements, but by dissociation and division.

Some other faculty than the intellect is necessary for the apprehension of reality.

Religion is to mysticism what popularization is to science