Let's see:
God made you to be you, don't you dare change just because you're outnumbered.
The Christian ideal has not been tried and found wanting; it has been found difficult and left untried.
They got their ______ from their _________ because I kept mine.
I think everyone feels that way sometimes, and by everyone I mean me.
Never explain, your friends don't need it and your enemies won't believe you anyway.
I'm sure there are more, they just aren't right at hand at the moment.