All the nations shall be blessed because of his obedience.

As Abrahan did not denied his son to God, the Lord God also did not denied His Son for the mankind.

Isaac was everything for Abrahan, the son of the promisse, the ultimate gift from God.

His obedience not only kept Isaac life safe, but it gave life to us all. 
God gave us His only son, the Lord Jesus Christ, as a eternal lamb, to save us all from our own sin.

Praise the Lord God almighty, that declares the end from the beginning and that make plans so perfect that even announcing them thousands of years beforehand do not harm them.

Evil can do NOTHING against our Lord plans, let´s all rejoice.

Salvation is at hand, for free, to all that accept Jesus Christ in their hearts and confess Him with their mouths. THIS IS THE GOSPEL. 
Very good news indeed, let´s all spread it till the day we die.

"Saying, I have taken an oath by my name, says the Lord, because you have done this and have not kept back from me your dearly loved only son,
That I will certainly give you my blessing, and your seed will be increased like the stars of heaven and the sand by the seaside; your seed will take the land of those who are against them;
And your seed will be a blessing to all the nations of the earth, because you have done what I gave you orders to do."

Gênesis 22:16-18