A man may be very sincere in good principles, without having good practice.

Principles-and I have in mind such principles as states' rights or national sovereignty or the free market or pacifism-have a way of drying up while the sap of life goes flowing in another direction.

Manners with fortunes, humours turn with climes, Tenets with books, and principles with times.

The fate of America cannot depend on any one man. The greatness of America is grounded in principles and not on any single personality.

Ideas and principles that do harm are, as a rule, though not always, cloaks for evil passions.

Prosperity is the best protector of principle.