The central message of this sermon is that the holiness of God poses a threat to humanity's sinful nature, and God's throne guardians serve to protect humans from His wrath by preventing them from comprehending or approaching Him. This idea advances the belief in God's transcendence and holiness, which are fundamental to the Christian understanding of God. The takeaway the teacher wants listeners to understand is that, despite their best efforts, humans are incapable of seeing or hearing God because of their sinful nature, and this is not a fault of God but rather a necessary protection for humanity.