In the realm of firefighting we have something called the fire tetrahedron; fuel, oxygen, and heat combine with a chemical reaction to produce fire. What about a Worldview Tetrahedron? Something like authority, morality and identity that are shown in your lived purpose. Individually you can have these different elements/beliefs but how you live demonstrates your true worldview. I've been trying to think of a way to introduce the idea of worldview analysis and apologetics to my youth group but give it my own personal flare (firefighting). So far this is what I have. From here you can get into the ideas of authority, identity and morality.