In Epistolam D. Pauli Apostoli ad Galatas notae

Therefore, the promise of the Gospel concerning the remission of sins is certain, indeed most certain.

And indeed, the Angels, since they desire nothing more than the glory of the Son of God, do not take it ill if Paul says that one must be accursed if even an Angel from heaven announces another Gospel, because, as is said in Philippians 2, the Angels and all beings in heaven and on earth and under the earth must bend their knees to Christ.

If the Son were to promise only in words, even then it would be a sin to doubt. But he actually—not just in words—receives our sins upon himself, suffers, and rises again.

10 Now, am I persuading men or God?

He brings forward two reasons from which the certainty of the Gospel consists. 1. That he has taught with true zeal for the glory of God, not for the favor of worldly men.

2. That he received the Gospel not from men, but from God.

Concerning the first argument, he says: If I were still trying to please men, I would not be a servant of Christ.

First, why does he say that he would not be a servant of Christ if he wanted to please men? Because men by nature are full of rebellion against God. Furthermore, they would want to conform God to their own desires. Even the pious desire this, and from time to time want ministers to gratify them. Therefore, since the appetites of men fight against God, a minister denies God if he flatters men. Conversely, when he does not flatter, but performs his duty, he is a servant of Christ, and Christ will actually bear witness to him of his presence. He will actually feel it, and experience will teach him how