Second son - Isaac
From Sensus Plenior
In the second son theme, the second son receives the inheritance that the first son loses. Isaac is literally a second son, and he is a second son by way of riddle. Isaac tells us something about Christ as the second Adam that we did not yet see in Abraham.
Isaac the literal second son
Ishmael was the first born child of Abram. He was born before Abram became Abraham. A change of name does not make him literally, not a child of Abraham, but Isaac is called the only begotten son of Abraham. [1] Literally, Isaac remained the second son of Abraham. In the role of the second son, he obtained the inheritance that Ishmael literally lost. [2]
