The seal of redemption

Satan cannot break the seal of the Lord.
The proof of this is found in the Book of Revelations.
When God had sealed the Book of Life, no one in Heaven,
the earth, or under the earth could break the seals thereof.

Only the Lamb of God can break any of the seals of the Lord.
But the Lamb of God came to save the world not condemn it.
He who has the seal of God has salvation and that salvation is sure.