If there is anything in the world which I do firmly believe in, it is the universal validity of the law of causation.

Some experience of popular lecturing had convinced me that the necessity of making things plain to uninstructed people, was one of the very best means of clearing up the obscure corners in one's own mind.

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

Science seems to me to teach in the highest and strongest manner the great truth which is embodied in the Christian conception of entire surrender to the will of God. Sit down before fact as a little child, be prepared to give up every preconceived notion, follow humbly wherever and to whatever abysses nature leads, or you shall learn nothing. I have only begun to learn content and peace of mind since I have resolved at all risks to do this.

The science, the art, the jurisprudence, the chief political and social theories, of the modern world have grown out of Greece and Rome-not by favour of, but in the teeth of, the fundamental teachings of early Christianity, to which science, art, and any serious occupation with the things of this world were alike despicable.

Action is the catalyst that creates accomplishments. It is the path that takes us from uncrafted hopes to realized dreams.

Of moral purpose I see no trace in Nature. That is an article of exclusively human manufacture and very much to our credit.