Nothing can be more incorrect than the assumption one sometimes meets with, that physics has one method, chemistry another, and biology a third.

If the hypothesis of evolution is true, living matter must have arisen from non-living matter; for by the hypothesis the condition of the globe was at one time such, that living matter could not have existed in it, life being entirely incompatible with the gaseous state.

In matters of intellect, follow your reason as far as it will take you, without regard for any other consideration.

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

That man, I think, has had a liberal education, who has been so trained in youth that his body is the ready servant of his will.

For myself I say deliberately, it is better to have a millstone tied round the neck and be thrown into the sea than to share the enterprises of those to whom the world has turned, and will turn, because they minister to its weaknesses and cover up the awful realities which it shudders to look at.

Science is simply common sense at its best.