And I will establish my covenant between me and thee and thy seed after thee in their generations for an everlasting covenant, to be a God unto thee, and to thy seed after thee.

For I know him, that he will command his children and his household after him, and they shall keep the way of the Lord, to do justice and judgment; that the Lord may bring upon Abraham that which he hath spoken of him.

For whosoever will save his life shall lose it: and whosoever will lose his life for my sake shall find it.

COMMENTARY

And I will establish my covenant between me and thee and thy seed after thee
For I know him, that he will command his children and his household after him, and they shall keep the way of the Lord
God viewed the children of Abraham as set apart. God made a special covenant with them, and He expected Abraham to raise them in a particular manner. These covenant children were to be taught to follow the Lord, to maintain covenant marriages, and to be circumcised. The Bible carefully notes that Abraham faithfully adhered to each of these details with his own son. Even though Abraham did not end up sacrificing Isaac, by this obedience he consecrated Isaac to God.
Consecrated means to set apart for a holy purpose.
And if Abraham hadn’t consecrated Isaac to the Lord, then he would have lost his promise and eventually his son. Sooner or later death would have separated them and they would have no assurances in the afterlife. That is the way of the world. Each of us is given family relationships, but without some divine intervention all of them would be taken away by the grave.
The promise of heaven, though, is that we can forever dwell with those we love. The power of the grave is therefore defeated in the resurrection…but only if we are willing to turn ourselves and those we love over to the Lord.

For whosoever will save his life shall lose it: and whosoever will lose his life for my sake shall find it.
This, I believe, is the central lesson that the Lord was teaching Abraham when he asked him to sacrifice Isaac. Because Abraham did not try to withhold Isaac from God, God would preserve Isaac and return him to his father. Not just in that one moment, but in eternity.
I am a father myself, and right now my wife and I are the most important people in my young son’s life. I want to be with my son forever, though, and that means I need to raise him so that he will move from my embrace and into God’s. It will hurt when he matures and comes to rely upon God more than me, but that is how it has to be.
If we love something, our natural tendency is to keep it for ourselves. But if we do this we will literally love it to death, and then we will have it no more. We have to surrender that which we love to God. When we do, it is not lost, it is found in the hands of the only one who can preserve it to us forever.