'Science in itself' is nothing, for it exists only in the human beings who are its bearers. 'Science for its own sake' usually means nothing more than science for the sake of the people who happen to be pursuing it.

As long as vitalism and spiritualism are open questions so long will the gateway of science be open to mysticism.

Laws should be made, not against quacks but against superstition.

If we would serve science, we must extend her limits, not only as far as our own knowledge is concerned, but in the estimation of others.

Marriages are not normally made to avoid having children.

Belief begins where science leaves off and ends where science begins.

If popular medicine gave the people wisdom as well as knowledge, it would be the best protection for scientific and well-trained physicians.