Pope Benedict XVI
Charity is love received and given. It is “grace” (cháris). Its source is the wellspring of the Father's love for the Son, in the Holy Spirit. Love comes down to us from the Son. It is creative love, through which we have our being; it is redemptive love, through which we are recreated. Love is revealed and made present by Christ (cf. Jn 13:1) and “poured into our hearts through the Holy Spirit” (Rom 5:5). As the objects of God's love, men and women become subjects of charity, they are called to make themselves instruments of grace, so as to pour forth God's charity and to weave networks of charity.
(CARITAS IN VERITATE No. 5)