And the second is like, namely this, You shall love your neighbor as yourself. There is no other commandment greater than these.
All Commentaries on Mark 12:31 Go To Mark 12
John Chrysostom
AD 407
This is the summit of virtue, the foundation of all God’s commandments: to the love of God is joined also love of neighbor. One who loves God does not neglect his brother, nor esteem money more than a limb of his own, but shows him great generosity, mindful of him who has said, “Whoever did it to the least of my brothers did it to me.” He is aware that the Lord of all considers as done to himself what is done in generosity to the poor in giving relief. He does not take into consideration the lowly appearance of the poor, but the greatness of the One who has promised to accept as done to himself what is given to the poor. Homilies on Genesis, Homily