Genesis 27:36

(Verse 36.) And Esau said, rightly is his name called Jacob: for he hath supplanted me these two times. Jacob is interpreted supplanter. And therefore, because he had deceived his brother by art, he alluded to the name. Therefore, he was called Jacob before, because he had taken hold of his brother's heel in his birth.

Now this is the first lust which conquered the world, and because of it the first transgression of the law took place. It dismissed from Esau his birthright and his blessings. For the lust of the belly is the captain of the host of the left side, and to it are fettered all the hosts of sin, and as captains of hosts go forth to war at the head of their companies against the enemy, even so also doth it, as the captain of the host of all wickedness, go forth to war against that which is good.

"And Esau said, 'Rightly is his name called Jacob.' " Tripping up is what Jacob means. And not even tripping up is empty of meaning, because it is to be taken figuratively, like guile. Jacob, you see, was not yet so malicious as to plan to trip his brother up, when he was given his name. He was called a tripper-up when as his brother was being born he held his foot with his own hand. That is when he was called "Tripper-up." Now tripping up the materialistically minded is the very life of the spiritually minded. All the materialists are tripped up when they envy the spiritual people in the church, and they thereby become worse. Listen to the apostle saying this very thing, especially because he there mentions the smell that Isaac talked about here, saying, "Behold, the smell of my son is as the smell of an abundant field, which the Lord has blessed." So the apostle says, "We are the sweet smell of Christ in every place," and he says, "For some indeed the smell of life, for life; for the others the smell of death, for death. And for this who is sufficient?" Sufficient, that is, to understand how we can be the smell of death for the death of other people, without any fault of ours. Spiritual people walk their ways, knowing nothing except how to live a good life. And those who are spiteful about their innocent lives commit grave sins, which is why God will punish them. And thus a person who is a sweet smell for life to others becomes to them a smell for death. For the Lord himself was the first to become a sweet smell for life to believers and a bad smell for death to persecutors. Because so many people had believed him, the Jews were full of spite and committed that enormous crime of killing the innocent one, the saint of saints. If they had not done this, the sweet smell of Christ would not have meant death for them. So Esau was tripped up in his father's blessing.