Indeed, can you afford not to?
Well, now, that depends. If the Bible is the inspired word of God, then no (that is, I can't afford not to).
On the other hand, if the Koran is the inspired word of Allah, then I (and you!) need to start bowing to Mecca. If the Norse Edda is correct, we need to die with a sword in our hand so Odin will let us into Valhalla.
Etc.
Anything supernatural strikes me as absurd. YMMV.