“You know them
By their fruits.
Are grapes gathered
From thorn bushes?
Are figs gathered
From thistles?”
ἀπὸ τῶν καρπῶν αὐτῶν ἐπιγνώσεσθε αὐτούς. μήτι συλλέγουσιν ἀπὸ ἀκανθῶν σταφυλὰς ἢ ἀπὸ τριβόλων σῦκα;
This saying of Jesus is somewhat similar to Luke, chapter 6:44-45, perhaps indicating a Q source. Jesus told his disciples, via Matthew, that they would know or discern people by their fruits (ἀπὸ τῶν καρπῶν αὐτῶν ἐπιγνώσεσθε αὐτούς). Then he asked the question whether grapes could be gathered from thorn bushes (μήτι συλλέγουσιν ἀπὸ ἀκανθῶν σταφυλὰς) or figs gathered from thistles (ἢ ἀπὸ τριβόλων σῦκα). Certain kinds of fruits only come from certain kinds of trees. Thus, you can tell what kind of tree it is by its fruit.