There’s nothing quite as frightening as someone who knows they are right. - Michael Faraday

Nature is our kindest friend and best critic in experimental science if we only allow her intimations to fall unbiased on our minds.

I am no poet, but if you think for yourselves, as I proceed, the facts will form a poem in your minds.

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 erroneous.