And we know that the Son of God has come and has given us understanding, so that we may know Him who is true; and we are in Him who is true—in His Son Jesus Christ. He is the true God and eternal life.
Textus Receptus (TR) - 1 John 5:20 >Οἴδαμεν δὲ ὅτι ὁ υἱὸς τοῦ Θεοῦ ἥκει, καὶ δέδωκεν ἡμῖν διάνοιαν ἵνα γινώσκωμεν τὸν ἀληθινόν· καί ἐσμεν ἐν τῷ ἀληθινῷ, ἐν τῷ υἱῷ αὐτοῦ Ἰησοῦ Χριστῷ. Οὗτός ἐστιν ὁ ἀληθινὸς Θεός, καὶ ἡ ζωὴ αἰώνιος.