God: "I looked for someone to take a stand for me, and stand in the gap" (Ezekiel 22:30)
Holiness is a fundamental attribute. It is the most important thing to know about [God]. It is where we start with God. His holiness defines all His other attributes... Day and night, those closest to Him, the cherubim and seraphim, cry, “Holy, holy, holy is the Lord of hosts” (Isa. 6:3). Everything about God is holy.
All the language that strikes terror into our hearts - weeping and gnashing of teeth, outer darkness, the worm, the fire, gehenna, the great gulf fixed - is all directly taken from our Lord’s teaching. It is from Jesus Christ that we learn the doctrine of eternal punishment.