John 7:17

17Ifἐάνanyoneτιςdesiresθέλῃtheτὸwillθέλημαof Himαὐτοῦto doποιεῖν,he will knowγνώσεταιconcerningπερὶtheτῆςteachingδιδαχῆςwhetherπότερονfromἐκτοῦGodθεοῦit isἐστινorἢIἐγὼfromἀπ’Myselfἐμαυτοῦspeakλαλῶ.

If anyone should desire to do His will, he will know concerning the teaching, whether it is from God, or I speak from Myself.