Either make the tree good, and its fruit good; or else make the tree corrupt, and its fruit corrupt: for the tree is known by its fruit.
All Commentaries on Matthew 12:33 Go To Matthew 12
Hilary of Poitiers
AD 368
Though spoken in the present, Jesus’ words would be borne out in the future. For in the present he refutes the Jews. They could see that the works of Christ were beyond human power, but they were unwilling to declare them as works of God. In saying this Jesus anticipates the future of numerous perversions of faith, especially of those who would divest the Lord of the dignity and union with the Father’s nature and so plunge into heresy. They then wander aimlessly in the arena between those who act with the excuse of ignorance and those who live in the knowledge of truth. … Through a tree’s inherent vitality, fruitfulness abounds. Therefore either the tree must be made good with good fruit or made bad with bad fruit, because by its fruit the tree is known. The meaning is not that a bad tree, according to the nature of trees, can constitute what is good or be good in its branches if it is bad. Rather, it is that Christ must either be left behind as useless or held onto as good because of the usefulness of good fruit.
