John Chrysostom
Isaac responded, "Understand that I have bestowed all my blessings upon him, making him your master. Notice how Isaac begins with this declaration, mentioning nothing else but foretelling servitude and subjugation for Esau: 'Behold, I have made him lord over you, and bestowed upon him all his siblings as servants; I have provided him with bread and wine; what can I do for you, my son? There is no further action to take. If I have appointed him your lord, all his brethren his servants, and I have wished him abundance in all his needs, what else can remain?"
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Prophecies frequently exhibit the quality that much of what is proclaimed about one individual is realized through another. As it is written of Simeon and Levi, "I will divide them in Jacob, and scatter them in Israel" (Gen. 49:7); this prophecy was indeed fulfilled not directly upon them, but rather upon their offspring. Similarly, what Noah uttered concerning Canaan became manifest in the fate of the Gibeonites, who were Canaan's descendants (Gen. 9:25, Hab. 9:27). This pattern is also observable in Jacob; the blessing conferred upon him, "Thou shalt be lord to thy brother, and the sons of thy father shall worship thee" (Gen. 27:29), was not realized in his own lifetime (as Jacob himself was fearful and trembled before his brother, often bowing to him), but rather upon his lineage.