(This seems particularly timely in light of Israel's fight to defend herself.)
You and I have the courage to say to our enemies, "There is a price we will not pay." There is a point beyond which they must not advance. This is the meaning in the phrase of Barry Goldwater's "peace through strength." Winston Churchill said that "the destiny of man is not measured by material computation. When great forces are on the move in the world, we learn we are spirits--not animals." And he said, "There is something going on in time and space, and beyond time and space, which, whether we like it or not, spells duty."
-Ronald Reagan's Rendezvous with Destiny speech, October 27, 1964