The philosopher should be a man willing to listen to every suggestion,but determined to judge for himself.He should not be a respector of persons,but of things.Truth should be his primary object.

... and what good is a baby?

But still try, for who knows what is possible?

There is no more open door by which you can enter into the study of natural philosophy than by considering the physical phenomena of a candle

Work, finish, publish.

What a weak, credulous, incredulous, unbelieving, superstitious, bold, frightened, what a ridiculous world ours is, as far as concerns the mind of man. How full of inconsistencies, contradictions and absurdities it is. I declare that taking the average of many minds that have recently come before me ... I should prefer the obedience, affections and instinct of a dog before it.

The world little knows how many of the thoughts and theories which have passed through the mind of a scientific investigator, have been crushed in silence and secrecy by his own severe criticism and adverse examination!