We are the Draft Beer Preservation Society.
Do you have no sense of self-preservation?
Thermonuclear fusion is an absolute requirement, for the preservation of the human species.
The preservation of friendship is seen as opportunism. You are required to be in one camp or the other. You are enjoined to cut your heartstrings if they extend across the barricade.
The blood of a nation ought never to be shed except for its own preservation in the utmost extremity.