Tertullian

The Lord had come, of course, to save that which "had perished; " "a Physician." necessary to "the sick" "more than to the whole." This fact He was in the habit both of typifying in parables and preaching in direct statements. Who among men "perishes," who falls from health, but he who knows not the Lord? Who is "safe and sound," but he who knows the Lord? These two classes-"brothers" by birth-this parable also will signify. See whether the heathen have in God the Father the "substance" of origin, and wisdom, and natural power of Godward recognition; by means of which power the apostle withal notes that "in the wisdom of God, the world through wisdom knew not God," -(wisdom) which, of course, it had received originally from God.