Necessity has no law, and expedience is often one form of necessity. It is no principle with sensible men, of whatever cast of opinion, to do always what is abstractedly best. Where no direct duty forbids, we may be obliged to do, as being best under circumstances, what we murmur and rise against, while we do it. We see that to attempt more is to effect less; that we must accept so much, or gain nothing; and so perforce we reconcile ourselves to what we would have far otherwise, if we could.

J.H.Newman