tn The phrase ἡ ἀγάπη τοῦ θεοῦ (hē agapē tou theou, “the love of God”) could be interpreted as either an objective genitive (“our love for God”), subjective genitive (“God’s love for us”), or both (M. Zerwick’s “general” genitive [“Biblical Greek”, §§36–39]; D. B. Wallace’s “plenary” genitive [ExSyn 119–21]). The immediate context, which discusses what God has done for believers, favors a subjective genitive, but the fact that this love is poured out within the hearts of believers implies that it may be the source for believers’ love for God; consequently an objective genitive cannot be ruled out. It is possible that both these ideas are meant in the text and that this is a plenary genitive: “The love that comes from God and that produces our love for God has been poured out within our hearts through the Holy Spirit who was given to us” (ExSyn 121).

sn On the OT background of the Spirit being poured out, see Isa 32:15; Joel 2:28–29.