The world is neither wise nor just, but it makes up for all its folly and injustice by being damnably sentimental.

Follow humbly wherever and to whatever abyss Nature leads, or you shall learn nothing.

The method of scientific investigation is nothing but the expression of the necessary mode of working of the human mind.

The foundation of morality is to have done, once and for all, with lying.

Creation,' in the ordinary sense of the word, is perfectly conceivable. I find no difficulty in conceiving that, at some former period, this universe was not in existence, and that it made its appearance in six days (or instantaneously, if that is preferred), in consequence of the volition of some preexisting Being.

In fact a favourite problem of Tyndall is-Given the molecular forces in a mutton chop, deduce Hamlet or Faust therefrom. He is confident that the Physics of the Future will solve this easily.

I really see no harm which can come of giving our children a little knowledge of physiology. ... The instruction must be real, based upon observation, eked out by good explanatory diagrams and models, and conveyed by a teacher whose own knowledge has been acquired by a study of the facts; and not the mere catechismal parrot-work which too often usurps the place of elementary teaching.