ὁ πιστεύων εἰς αὐτὸν οὐ κρίνεται· ὁ δὲ μὴ πιστεύων ἤδη κέκριται, ὅτι μὴ πεπίστευκεν εἰς τὸ ὄνομα τοῦ μονογενοῦς υἱοῦ τοῦ Θεοῦ.
Literal English TranslationThe one who believes in him is not judged; but the one who does not believe has already been judged, because he has not believed in the name of the only begotten Son of God.
Present Tense with Eternal Stakes ὁ πιστεύων… οὐ κρίνεται The participle ὁ πιστεύων (present active nominative masculine singular) functions as a substantive—“the one who believes.” Present tense signals an ongoing or characteristic belief. The passive verb κρίνεται (from κρίνω) means “is judged,” with a legal or eschatological sense.… Learn Koine Greek