Thus, the way which Christ showed to us in the Sermon on the Mount with the beatitude regarding those who are merciful is much richer than what we sometimes find in ordinary human opinions about mercy. These opinions see mercy as a unilateral act or process, presupposing and maintaining a certain distance between the one practicing mercy and the one benefitting from it, between the one who does good and the one who receives it. Hence the attempt to free interpersonal and social relationships from mercy and to base them solely on justice. However, such opinions about mercy fail to see the fundamental link between mercy and justice spoken of by the whole biblical tradition, and above all by the messianic mission of Jesus Christ. True mercy is, so to speak, the most profound source of justice. If justice is in itself suitable for "arbitration" between people concerning the reciprocal distribution of objective goods in an equitable manner, love and only love (including that kindly love that we call "mercy") is capable of restoring man to Himself.
Mercy that is truly Christian is also, in a certain sense, the most perfect incarnation of "equality" between people, and therefore also the most perfect incarnation of justice as well, insofar as justice aims at the same result in its own sphere. However, the equality brought by justice is limited to the realm of objective and extrinsic goods, while love and mercy bring it about that people meet one another in that value which is man himself, with the dignity that is proper to him. At the same time, "equality" of people through "patient and kind" love122 does not take away differences: the person who gives becomes more generous when he feels at the same time benefitted by the person accepting his gift; and vice versa, the person who accepts the gift with the awareness that, in accepting it, he too is doing good is in his own way serving the great cause of the dignity of the person; and this contributes to uniting people in a more profound manner.