A.T. Robertson Commentary Romans 11:15

"For if the casting away of them [is] the reconciling of the world, what [shall] the receiving [of them be], but life from the dead?" — Romans 11:15 (ASV)

The casting away of them (η αποβολη αυτων). Objective genitive (αυτων) with αποβολη, old word from αποβαλλω, to throw off , in N.T. only here and Ac 27:22.

The reconciling of the world (καταλλαγη κοσμου). See 5:10f. for καταλλαγη (reconciling). It explains verse 12.

The receiving (η προσλημψις). Old word from προσλαμβανω, to take to oneself, only here in N.T.

Life from the dead (ζωη εκ νεκρων). Already the conversion of Jews had become so difficult. It is like a miracle of grace today, though it does happen. Many think that Paul means that the general resurrection and the end will come when the Jews are converted. Possibly so, but it is by no means certain. His language may be merely figurative.