The birth of science was the death of superstition.

It is better to read a little and thoroughly than cram a crude undigested mass into my head, though it be great in quantity.

The man of science has learned to believe in justification, not by faith, but by verification.

Science ... warns me to be careful how I adopt a view which jumps with my preconceptions, and to require stronger evidence for such belief than for one to which I was previously hostile. My business is to teach my aspirations to conform themselves to fact, not to try and make facts harmonize with my aspirations.

Better live a crossing-sweeper than die and be made to talk twaddle by a "medium" hired at a guinea a seance.

I care not what subject is taught, if only it be taught well.

It is one of the most saddening things in life that, try as we may, we can never be certain of making people happy, whereas we can almost always be certain of making them unhappy.