Genesis 27:37

37. Behold, I have made him thy Lord. Isaac now more openly confirms what I have before said, that since God was the author of the blessing, it could neither be vain nor evanescent. For he does not here magnificently boast of his dignity, but keeps himself within the bounds and measure of a servant, and denies that he is at liberty to alter anything. For he always considers, (which is the truth,) that when he sustains the character of God’s representative, it is not lawful for him to proceed further than the command will bear him. Hence, indeed, Esau ought to have learned from whence he had fallen by his own fault, in order that he might have humbled himself, and might rather have joined himself with his brother, in order to become a partaker of his blessing, as his inferior, than have desired anything separately for himself. But a depraved cupidity carries him away, so that he, forgetful of the kingdom of God, pursues and cares for nothing except his own private advantage. Again, we must notice Isaac’s manner of speaking, by which he claims a certain force and efficacy for his benediction, as if his word carried with it dominion, abundance of corn and wine, and whatever else God had promised to Abraham. For God, in requiring the faithful to depend on himself alone, would nevertheless have them to rest securely upon the word, which, at his command, is declared to them by the tongue of men. In this way they are said to remit sins, who are only the messengers and interpreters of free forgiveness.