It is impossible, in principle, to explain any pattern by invoking a single quantity.
Gregory BatesonI am a man of fixed and unbending principles, the first of which is to be flexible at all times.
Everett DirksenNo matter what side of the spectrum you're on, you like to see your team fighting for the principle.
Bob McDonnellAlthough the principle of equality has always been self-evident, it has never been self-executing.
Barack ObamaPrinciples and rules are intended to provide a thinking man with a frame of reference.
Carl von Clausewitz