[2] This is described by the Lord by “salt,” where he says in Matthew: “Ye are the salt of the earth; but if the salt has lost its savor, wherewith shall it be salted? It is thenceforth good for nothing, but to be cast out and trodden under foot of men” (Matt. 5:13); these words the Lord says to the disciples and to the people. By “the salt of the earth” is meant the truth of the church which longs for good; by “the salt that has lost its savor” is meant truth without any longing for good; that such truth is profitable for nothing is described by “the salt that has lost its savor being thenceforth good for nothing, but to be cast out and trodden underfoot.” To long for good is to long to do what is good, and in this way to be conjoined with good.