17Ἐάν τις θέλῃ τὸ θέλημα αὐτοῦ ποιεῖν, γνώσεται περὶ τῆς διδαχῆς, πότερον ἐκ τοῦ Θεοῦ ἐστιν ἢ ἐγὼ ἀπ᾿ ἐμαυτοῦ λαλῶ.
18Ὁ ἀφ᾿ ἑαυτοῦ λαλῶν τὴν δόξαν τὴν ἰδίαν ζητεῖ, ὁ δὲ ζητῶν τὴν δόξαν τοῦ πέμψαντος αὐτόν, οὗτος ἀληθής ἐστιν, καὶ ἀδικία ἐν αὐτῷ οὐκ ἔστιν.