Expedients are for the hour, but principles are for the ages. – Henry Ward Beecher

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