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
Augustine of Hippo
AD 430
When he says, “Make the tree good and its fruit good,” this is not a friendly admonition but a clear command to be obeyed. And when Jesus says, “Make the tree bad and its fruit bad,” he does not command you to do so, but he warns you to guard against it. He is referring to those who think they are able, though they are bad, to speak good things or to do good works. This the Lord Jesus says they cannot do. For a person must first be changed in order for his works to be changed. But if a person remains in an evil state, that one cannot do good works. If he abides in what is good, he will not be found producing evil works. .
