1. When you teach your kids, you need to be hard-nosed and say, "That's the way it is. No negotiations." Otherwise, your kids may keep arguing with you and tire you out.2. As a Christian, do not give up your position and succumb to worldly matters that contradict the Bible's principles.
 be hard-nosed do not give up
All the wok I've been putting into this project has been all for nothing because my boss is shutting it down.