Publicola has written an excellent piece, Resolve, that I strongly recommend you read. Today’s QotD comes from it:
We have to be more determined than our enemies, but our focus does not have to be on them exclusively, or rather not on who we think our enemies are. Bluntly, our enemy isn’t flesh and blood – that’s just a manifestation. Our enemy is the idea that our culture is not worth saving. Our enemy is the notion that our culture can compromise on its values. Our enemy is the practice of appeasement.