Whatever one’s exegesis of the parable of the sower is, there is a clear and unmistakable pointer to the visible/invisible church distinction in the parable of the net. Here is the text:
47 “Again, the kingdom of heaven is like a net that was thrown into the sea and gathered fish of every kind. 48 When it was full, men drew it ashore and sat down and sorted the good into containers but threw away the bad. 49 So it will be at the close of the age. The angels will come out and separate the evil from the righteous 50 and throw them into the fiery furnace. In that place there will be weeping and gnashing of teeth.
And in Greek:
47Πάλιν ὁμοία ἐστὶν ἡ βασιλεία τῶν οὐρανῶν σαγήνῃ βληθείσῃ εἰς τὴν θάλασσαν καὶ ἐκ παντὸς γένους συναγαγούσῃ: 48ἣν ὅτε ἐπληρώθη ἀναβιβάσαντες ἐπὶ τὸν αἰγιαλὸν καὶ καθίσαντες συνέλεξαν τὰ καλὰ εἰς ἄγγη, τὰ δὲ σαπρὰ ἔξω ἔβαλον. 49οὕτως ἔσται ἐν τῇ συντελείᾳ τοῦ αἰῶνος: ἐξελεύσονται οἱ ἄγγελοι καὶ ἀφοριοῦσιν τοὺς πονηροὺς ἐκ μέσου τῶν δικαίων 50καὶ βαλοῦσιν αὐτοὺς εἰς τὴν κάμινον τοῦ πυρός: ἐκεῖ ἔσται ὁ κλαυθμὸς καὶ ὁ βρυγμὸς τῶν ὀδόντων.
So, the kingdom of heaven (note that: the kingdom of heaven) is like a net which drags in all sorts of different things IN THE PRESENT. That is the import of “fish of every kind.” Fish of a good kind, and fish of a bad kind. The net, by the way, is a long net (250-450 meters long, 2 meters wide, according to Luz, pg. 283) manned by quite a few men. It is being filled now (vs. 48). Then, at the close of the age, the angels will do the sorting. As a matter of fact, then, there are people within the kingdom who will not be sorted out until the final reckoning. But this is a clear passage supporting the present distinction between visible and invisible church.