33 With regard to the personnel who carry out the Church's charitable activity on the practical level, the essential has already been said: they must not be inspired by ideologies aimed at improving the world, but should rather be guided by the faith which works through love (cf. Gal 5:6). Consequently, more than anything, they must be persons moved by Christ's love, persons whose hearts Christ has conquered with his love, awakening within them a love of neighbour. The criterion inspiring their activity should be Saint Paul's statement in the Second Letter to the Corinthians : “the love of Christ urges us on” (5:14). The consciousness that, in Christ, God has given himself for us, even unto death, must inspire us to live no longer for ourselves but for him, and, with him, for others. Whoever loves Christ loves the Church, and desires the Church to be increasingly the image and instrument of the love which flows from Christ. The personnel of every Catholic charitable organization want to work with the Church and therefore with the Bishop, so that the love of God can spread throughout the world. By their sharing in the Church's practice of love, they wish to be witnesses of God and of Christ, and they wish for this very reason freely to do good to all.
Source: Deus Caritas Est (Vatican.va)