In these verses, we get a sample of the kind of thing that Jesus said to his disciples but wouldn’t say openly to the multitude.
The relevant technical term here is disciplina arcani.
I love Matthew 13:43:
τότε οἱ δίκαιοι ἐκλάμψουσιν ὡς ὁ ἥλιος ἐν τῇ βασιλείᾳ τοῦ Πατρὸς αὐτῶν. ὁ ἔχων ὦτα ἀκουέτω.
“Then the righteous will shine like the sun in the kingdom of their Father. He who has ears, let him hear.”