What does the Bible say about the essence of hell?

The essence of hell, as described in Scripture, is not the absence of God but rather the overwhelming presence of His holy wrath and justice, devoid of mercy. In Hebrews 10:31, it is declared that it is a fearful thing to fall into the hands of the living God, emphasizing the terror of being judged by His holiness. Revelation 6:16 further illustrates that even in hell, the unrepentant sinners will realize God's presence, yet will only experience His justice and majesty, stripped of any grace or favor that could offer comfort.