We find that this birthright meant everything to Jacob. Now, he didn't care for nothing else, but that birthright. He didn't care what it cost him. If it was a mess of pottage. He was glad to give it back to Esau. So is it with any man or woman that has been ordained to Eternal Life, that God has called to Eternal Life, is willing to sell out anything--anything of the world to obtain that birthright.
You can call them anything you want to. You can tell them they've lost their mind, gone off on the deep end, bunch of holy-rollers. I don't care what you call them, they're seeking for that birthright, and that means more than anything else. They are after that birthright; no matter how they have to get it, they're ready to get it. [Genesis 25:31-32]

A carnal mind wants God to bring the birthright down to their level. But for me, and I believe all true born Christians, we meet it on God's level. I don't care what I have to do, or what I have to say, how I have to act: the only thing, I want it. That's means more than my popularity. That means more than my job. It means more than my mother, means more than my wife, more than my children, more than every friend I got. Let me have that birthright. I don't care what I have to pay. I want to meet God on His requirement.

Whatever He requires, if it's fall in dust, if it's speak with tongues, if it's run through the building and act like a maniac, or stand on my head, I don't care what it is, just so I get it. That's the main thing. That's the spiritual minded people. They want the birthright, regardless.
They want it. And as soon as they get it, it sets up the same reaction it was in that family. Finally, it'll come to a place till there come a separation. A man will have to obtain, if he obtains this birthright, he will have to separate himself from the world, just as Jacob had to.

William Branham, Sermon "Hearing, Receiving, And Acting"
http://www.en.branham.ru/read_prop.php?date=60-0607