In the laboratory there are no fustian ranks, no brummagem aristocracies; the domain of Science is a republic, and all its citizens are brothers and equals, its princes of Monaco and its stonemasons of Cromarty meeting, barren of man-made gauds and meretricious decorations, upon the one majestic level!

That's just the way: a person does a low-down thing, and then he don't want to take no consequences of it. Thinks as long as he can hide it, it ain't no disgrace.

No sane man can be happy, for to him life is real, and he sees what a fearful thing it is.

There is nothing training cannot do. Nothing is above its reach. It can turn bad morals to good; it can destroy bad principles and recreate good ones; it can lift men to angelship.

His money is twice tainted: taint yours and taint mine.

A person who has a cat by the tail knows a whole lot more about cats than someone who has just read about them.

You see, he knew his own laws just as other people so often know the laws: by words, not by effects. They take a meaning, and get to be very vivid, when you come to apply them to yourself.