“No good tree
Bears bad fruit.
Does a bad tree
Bear good fruit.”
Οὐ γάρ ἐστιν δένδρον καλὸν ποιοῦν καρπὸν σαπρόν, οὐδὲ πάλιν δένδρον σαπρὸν ποιοῦν καρπὸν καλόν.
Luke indicated that Jesus said that no good tree bears bad fruit (Οὐ γάρ ἐστιν δένδρον καλὸν ποιοῦν καρπὸν σαπρόν). Nor does a bad tree bear good fruit (οὐδὲ πάλιν δένδρον σαπρὸν ποιοῦν καρπὸν καλόν). This is a basic common-sense statement. There was something similar to this in the preaching of John the Baptist earlier in chapter 3:9 and Matthew, chapter 7:17-18, and chapter 12:33, perhaps from the Q source. The good tree produces good fruit. The bad tree produces bad fruit. The good tree is not able to produce evil fruit, while the evil tree is not able to produce good fruit. Either a tree is good or rotten. Simply stated, a good or bad tree will only produce what it is. There will be no mixing of the good and the bad fruits. Good fruit only comes from good trees, while rotten fruits only come from rotten trees. You can tell what kind of a tree it is by its fruits. Do you produce good or bad fruit?