I've always believed the purpose of creation to create eternal "human" life in God's kingdom, a sort of reproduction of eternal beings, passing on that life to newcomers.
Don't know what else is the biggest question, but I've never had a satisfactory answer to the weapons burning of very explicit old time weapons in Ezekiel,
Ezekiel 39:9 And they that dwell in the cities of Israel shall go forth, and shall set on fire and burn the weapons, both the shields and the bucklers, the bows and the arrows, and the handstaves, and the spears, and they shall burn them with fire seven years.
I can't accept the Gog and Magog war of Ezekiel is the same as the Revelation, post-millennium incident, where it could be said the weapons would be primitive, but there's a substantial list of things that don't fit. On the other hand, an end times war would hardly be fought with ancient weapons that burn. All explanations I've heard do not well account for such as the above verse. (Like there's some new gun material the Russians have that burns: the barrel won't burn, tanks don't burn, personnel carriers, etc. They will use fossil fuel from vehicles for fuel after the war, but the above verse clearly states the weapons themselves are set on fire. I've heard it all, and nothing really fits!)
Add to that the Ezekiel temple that's never been built, that cannot be the tribulation temple, but why is there animal sacrifice in that temple?
Chunks of the book of Ezekiel are a real fuzz ball to me and everybody else who'll admit their theories are just that.