Man, as we realize if we reflect for a moment, never perceives anything fully or comprehends anything completely.

I notice men themselves have never invented a god capable of understanding them.

Science does not know its debt to imagination.

The history of mathematics throws little light on the psychology of mathematical invention.

Men are in fact, quite unable to control their own inventions; they at best develop adaptability to the new conditions those inventions create.

As far as I'm concerned, humans have not yet come up with a belief that's worth believing.

But man's capacities have never been measured; nor are we to judge of what he can do by any precedents, so little have been tried.

The progressive development of moral and intellectual man has scarcely occupied their [scientists] attention; nor have they noted how the faculties of his mind are at every age influenced by those of the body, nor how his faculties mutually react.

For whatever is truly wondrous and fearful in man, never yet was put into words or books.

Psychologists have hitherto failed to realize that imagination is a necessary ingredient of perception itself.

Men simply don’t think.” And

Men do not know how to appreciate or measure luck except that of others. Their own never.

That technics has often lagged behind culture, that the efficiency of the assembly line, for example, might be, humanly speaking, a mark of social backwardness, seems never to have occurred to the exponents of unqualified technological progress.

Abundance of knowledge does not teach men to be wise.