“The true deity of Christ is proved by this conclusion: Paul attributes to Him the ability to grant the very same things that the Father does—grace, peace of conscience, the forgiveness of sins, life, and victory over sin, death, the devil, and hell.
This would be illegitimate, in fact, sacrilegious, if Christ were not true God. For no one grants peace unless he himself has it in his hands. But since Christ grants it, He must have it in His hands.
Christ gives grace and peace, not as the apostles did, by preaching the Gospel, but as its Author and Creator. The Father creates and gives life, grace, peace, etc.; the Son creates and gives the very same things.
To give grace, peace, eternal life, the forgiveness of sins, justification, life, and deliverance from death and the devil—these are the works, not of any creature but only of the Divine Majesty.
The angels can neither create these things nor grant them. Therefore these works belong only to the glory of the sovereign Majesty, the Maker of all things.
And since Paul attributes the very same power to create and give all this to Christ just as much as to the Father, it follows necessarily that Christ is truly God by nature.”
–Martin Luther, Luther’s Works, Vol. 26: Lectures on Galatians, 1535, Chapters 1-4 (ed. Jaroslav Jan Pelikan, Hilton C. Oswald, and Helmut T. Lehmann; vol. 26; Saint Louis: Concordia Publishing House, 1999), 26: 31.