Time is a great legalizer, even in the field of morals

The most disgusting cad in the world is the man who on the grounds of decorum and morality avoids the game of love. He is one who puts his own ease and security above the most laudable of philanthropies.

There's no underestimating the intelligence of the American public.

The best teacher is not the one who knows most but the one who is most capable of reducing knowledge to that simple compound of the obvious and wonderful.

The only kind of freedom that the mob can imagine is freedom to annoy and oppress its betters, and that is precisely the kind that we mainly have.

All [zoos] actually offer to the public in return for the taxes spent upon them is a form of idle and witless amusement, compared to which a visit to a penitentiary, or even to a State legislature in session, is informing, stimulating and ennobling.

The true aim of medicine is not to make men virtuous; it is to safeguard and rescue them from the consequences of their vices. The physician does not preach repentance; he offers absolution.