New Defender's Study Bible Notes
27:33 trembled very exceedingly. Literally, “most excessively with a great trembling.” A violent complex of emotions overwhelmed Isaac, as he suddenly realized all that had happened, and the reasons behind it all.
27:33 he shall be blessed. Isaac’s anger and resentment were overshadowed by his realization that God Himself had intervened. God was going to bless Jacob and there was no way Isaac could change this. In fact, the blessing would have gone to Jacob even if Isaac had succeeded in pronouncing it upon Esau. Man’s will cannot thwart God’s purposes.