Pope Benedict XVI
“Charity goes beyond justice, because to love is to give, to offer what is ‘mine’ to the other; but it never lacks justice, which prompts us to give the other what is ‘his’, what is due to him by reason of his being or his acting. I cannot ‘give’ what is mine to the other without first giving him what pertains to him in justice. If we love others with charity, then first of all we are just towards them. Not only is justice not extraneous to charity, not only is it not an alternative or parallel path to charity: justice is inseparable from charity and intrinsic to it. Justice is the primary way of charity, or, in Paul VI’s words, ‘the minimum measure’ of it, an integral part of the love ‘in deed and in truth’ (1 Jn 3:18) to which Saint John exhorts us.”
Source: Pope Benedict XVI, CARITAS IN VERITATE (Charity in Truth), 6/29/2009