More important, a great prophetic picture was there enacted, portraying how Christ Jesus, the Greater Isaac, would in due time willingly lay down his human life as the Lamb of God for mankind’s salvation.​—Joh 1:29, 36; 3:16.

Isaac as the seed of Abraham was pictorial of Christ, through whom everlasting blessings come. As it is written: “Now the promises were spoken to Abraham and to his seed. It says, not: ‘And to seeds,’ as in the case of many such, but as in the case of one: ‘And to your seed,’ who is Christ.” And by extension, Isaac was also pictorial of those who “belong to Christ,” who “are really Abraham’s seed, heirs with reference to a promise.” (Ga 3:16, 29) Furthermore, the two boys, Isaac and Ishmael, together with their mothers, “stand as a symbolic drama.” Whereas natural Israel (like Ishmael) “was actually born in the manner of flesh,” these making up spiritual Israel “are children belonging to the promise the same as Isaac was.”​—Ga 4:21-31.