History warns us that it is the customary fate of new truths to begin as heresies and to end as superstitions.

Matter and force are the two names of the one artist who fashions the living as well as the lifeless.

I conceive that the leading characteristic of the nineteenth century has been the rapid growth of the scientific spirit, the consequent application of scientific methods of investigation to all the problems with which the human mind is occupied, and the correlative rejection of traditional beliefs which have proved their incompetence to bear such investigation.

Extinguished theologians lie about the cradle of every science, as strangled snakes beside that of Hercules

True science and true religion are twin sisters, and the separation of either from the other is sure to prove the death of both. Science prospers exactly in proportion as it is religious; and religion flourishes in exact proportion to the scientific depth and firmness of its basis.

The question of all questions for humanity, the problem which lies behind all others and is more interesting than any of them, is that of the determination of man's place in nature and his relation to the cosmos.

People may talk about intellectual teaching, but what we principally want is the moral teaching.