5 Divine Love first takes its origin from the Holy Spirit, Who is the Love in Person of the Father and the Son in the bosom of the most Holy Trinity. Most aptly then does the Apostle of the Gentiles echo, as it were, the words of Jesus Christ, when he ascribes the pouring forth of love in the hearts of believers to this Spirit of Love: "The charity of God is poured forth in our hearts by the Holy Spirit Who is given to us."(5)
Source: Haurietis Aquas (Vatican.va)