It is right that we should stand by and act on our principles; but not right to hold them in obstinate blindness, or retain them when proved to be er… - Michael Faraday

I was at first almost frightened when I saw such mathematical force made to bear upon the subject, and then wondered to see that the subject stood it so well.

An intimate friend of Faraday once described to me how, when Faraday was endeavouring to explain to Gladstone and several others an important new discovery in science Gladstone's only commentary was “but, after all, what use is it?” “Why, sir,” replied Faraday, “there is every probability that you will soon be able to tax it!”

A man who is certain he is right is almost sure to be wrong.