Science, my lad, is made up of mistakes, but they are mistakes which it is useful to make, because they lead little by little to the truth.
I believe cats to be spirits come to earth. A cat, I am sure, could walk on a cloud without coming through.
We may brave human laws, but we cannot resist natural ones.
He who is mistaken in an action which he sincerely believes to be right may be an enemy, but retains our esteem.
Man is never perfect, nor contented.