# the children of the flesh are not

Here "children of the flesh" is a metonym that refers to the physical descendants of Abraham. Alternate translation: "not all of Abraham's descendants are" (See: [[rc://en/ta/man/jit/figs-metonymy]])

# children of God

This is a metaphor that refers to people who are spiritual descendants, those who have faith in Jesus. (See: [[rc://en/ta/man/jit/figs-metaphor]])

# children of the promise

This refers to people who will inherit the promises that God gave to Abraham.