Luke indicated that Jesus continued to pick on his dinner guests, the Pharisees. Jesus cursed these Pharisees without naming them. He said woe to them (οὐαὶ ὑμῖν) because they were like unmarked graves (ὅτι ἐστὲ ὡς τὰ μνημεῖα τὰ ἄδηλα) that people or men would walk over without realizing it (καὶ οἱ ἄνθρωποι οἱ περιπατοῦντες ἐπάνω οὐκ οἴδασιν). There was something similar in Matthew, chapter 23:27, where Jesus continued to curse the Pharisees and the Scribes. There was no doubt that Jesus was cursing the Scribes and the Pharisees because of their false hearts. They were like whitewashed tombs, that looked outwardly beautiful. However, the inside of these unmarked tombs was full of the bones of dead people and other kinds of filth or impure things. Thus, the Pharisees appear to look righteous on the outside to others. However, on the inside, in their hearts, they were full of hypocrisy, iniquity, and lawlessness. Matthew went into more detail than Luke did here, sitting with them at dinner. Have you ever complained directly to people at a dinner party?
This little saying about love growing cold is unique to Matthew. Jesus continued saying that due to the increase of lawlessness (καὶ διὰ τὸ πληθυνθῆναι τὴν ἀνομίαν) in Jewish society, the love of many would grow cold (ψυγήσεται ἡ ἀγάπη τῶν πολλῶν). In the midst of all this tribulation, revolutions, and destructions, the Christian love, their agape (ἡ ἀγάπη) would cool or grow cold.
There is something similar in Luke, chapter 11:44. Jesus continued to curse the Pharisees and the Scribes, much like earlier in verses 13, 14, 15 and 25. The first part of this diatribe is exactly the same as those earlier verses. Woe to you (Οὐαὶ ὑμῖν)! Scribes (γραμματεῖς)! Woe to you! Pharisees (καὶ Φαρισαῖοι)! Hypocrites (ὑποκριταί)! There is no doubt that here Jesus was cursing the Scribes and the Pharisees. This time it was a continuation against the false hearts of the Pharisees. They were like whitewashed tombs (ὅτι παρομοιάζετε τάφοις κεκονιαμένοις), that looked outwardly beautiful (οἵτινες ἔξωθεν μὲν φαίνονται ὡραῖοι). However, the inside of these unmarked tombs was full of the bones of dead people and other kinds of filth or impure things (ἔσωθεν δὲ γέμουσιν ὀστέων νεκρῶν καὶ πάσης ἀκαθαρσίας). Thus, the Pharisees appear to look righteous on the outside to others (οὕτως καὶ ὑμεῖς ἔξωθεν μὲν φαίνεσθε τοῖς ἀνθρώποις δίκαιοι). However, on the inside of them, in their hearts, they are full of hypocrisy and iniquity or lawlessness (ἔσωθεν δέ ἐστε μεστοὶ ὑποκρίσεως καὶ ἀνομίας).
The Lord will send aimed shafts of lightning. He will leap from the clouds to hit the target like a good archer. Hailstones will come down as from a catapult launcher. The sea and waters will rage and overwhelm them. A tempest will roar across the land. Lawlessness will destroy the earth as the evildoers will take over the royal thrones. So the judgment has come upon earth.