Principle, particularly moral principal, can never be a weathervane, spinning around this way and that with the shifting winds of expediency. Moral principle is a compass forever fixed and forever true. And that is as important in business as it is in the classroom. – Edward R. Lyman

A striking feature of moral and political argument in the modern world is the extent to which it is innovators, radicals, and revolutionaries who revive old doctrines, while their conservative and reactionary opponents are the inventors of new ones. – Alasdair Chalmers Macintyre

The American doctrinaire is the converse of the American demagogue, and, in this way, is scarcely less injurious to the public. The first deals in poetry, the last in cant. He is as much a visionary on one side, as the extreme theoretical democrat is a visionary on the other. – James Fenimore Cooper