Christ’s work is guaranteed success because God has decreed it. The passage throbs with certainty. The Lord will meet with fierce opposition in the process, but He shall prevail against His enemies (verse 13). The eternal decree cannot be frustrated. If God declares it, it shall be done; it cannot be anything other than accomplished. His people shall be redeemed. Sin and Satan shall be destroyed. Christ shall usher in His eternal kingdom of righteousness and peace.
He will not fail because He is upheld by omnipotence. This great purpose is wrought by deity. It cannot fail. The One who is appointed by God to accomplish redemption is Immanuel, the God-Man, who is, therefore, upheld by the omnipotence of God.
Some imagine that Christ did His part to procure salvation, but left the other part to man. Such a theory contradicts Scripture. Christ not only finished the work of atonement; by His almighty power He now applies the redemption He purchased to the hearts of His people, drawing them, quickening them, sanctifying them, and eventually glorifying them. Let every afflicted and weary believer take refuge in these words: He shall not fail!