2 Peter 3:10 (KJV) says:
"But the day of the Lord will come as a thief in the night; in the which the heavens shall pass away with a great noise, and the elements shall melt with fervent heat, the earth also and the works that are therein shall be burned up."
This is often interpreted literally — as if the physical universe will be destroyed by fire. However, “elements” (Greek: stoicheia) can mean more than just physical matter. In many New Testament passages, stoicheia refers to basic principles or foundational systems, especially of the world or religious order.
This suggests Peter may be referencing not just a physical destruction, but the burning away of old systems, like the Old Covenant and the temple-centered world.
2 Peter 3:15-16 says:
"...our beloved brother Paul also according to the wisdom given unto him hath written unto you... in which are some things hard to be understood..."
Peter affirms that Paul also spoke of this transformation, though not in the same language. While Paul does not describe physical elements being burned, he writes extensively about the passing away of the Old Covenant and the transition to the New Covenant.
Paul's writings emphasize the fading of the old system:
The temple still stood, and the sacrificial system still operated, but it was about to vanish — a reality viewed by some as catastrophic.
The New Covenant is focused on the heart:
"I will put my law in their inward parts, and write it in their hearts" (Jeremiah 31:33, quoted in Hebrews 8:10).
Rather than relating to God through external law and rituals, believers now relate directly by the Spirit. The true temple is now the people of God:
When Peter describes “fervent heat” and “burning up,” it may be symbolic language describing the end of the Old Covenant system. Paul and Peter are in harmony, both addressing a major spiritual transition: from shadow to substance, law to grace, and temple to Spirit. It was difficult for first-century believers to understand — especially those deeply rooted in the old system.