The Basis of Morality by Part 3 Chapter 7 Page 14

a ready-made system of Morals. From justice and loving-kindness spring all the other virtues; for which reason these two may properly be called cardinal, and the disclosure of their origin lays the corner-stone of Moral Science.

The entire ethical content of the Old Testament is justice; loving-kindness being that of the New. The latter is the ?a??? ??t??? (the new commandment [John xiii. 34]), which according to Paul (Romans xiii. 8-10) includes all Christian virtues.