The One Test That Changes Everything.
Greek (SBLGNT) with ESV parallel
fresh.bible editorialἈγαπητοί, μὴ παντὶ πνεύματι πιστεύετε, ἀλλὰ δοκιμάζετε τὰ πνεύματα εἰ ἐκ τοῦ θεοῦ ἐστιν, ὅτι πολλοὶ ψευδοπροφῆται ἐξεληλύθασιν εἰς τὸν κόσμον.
[1] Beloved, do not believe every spirit, but test the spirits to see whether they are from God, for many false prophets have gone out into the world.
ἐν τούτῳ γινώσκετε τὸ πνεῦμα τοῦ θεοῦ· πᾶν πνεῦμα ὃ ὁμολογεῖ Ἰησοῦν Χριστὸν ἐν σαρκὶ ἐληλυθότα ἐκ τοῦ θεοῦ ἐστιν,
[2] By this you know the Spirit of God: every spirit that confesses that Jesus Christ has come in the flesh is from God,
καὶ πᾶν πνεῦμα ὃ μὴ ὁμολογεῖ τὸν Ἰησοῦν ἐκ τοῦ θεοῦ οὐκ ἔστιν· καὶ τοῦτό ἐστιν τὸ τοῦ ἀντιχρίστου, ὃ ἀκηκόατε ὅτι ἔρχεται, καὶ νῦν ἐν τῷ κόσμῳ ἐστὶν ἤδη.
[3] and every spirit that does not confess Jesus is not from God. This is the spirit of the antichrist, which you heard was coming and now is in the world already.
ὑμεῖς ἐκ τοῦ θεοῦ ἐστε, τεκνία, καὶ νενικήκατε αὐτούς, ὅτι μείζων ἐστὶν ὁ ἐν ὑμῖν ἢ ὁ ἐν τῷ κόσμῳ·
[4] Little children, you are from God and have overcome them, for he who is in you is greater than he who is in the world.
Sources
SBL Greek New Testament (SBLGNT) · English Standard Version (ESV)