1 Πᾶς ὁ πιστεύων ὅτι Ἰησοῦς ἐστιν ὁ Χριστὸς ἐκ τοῦ θεοῦ γεγέννηται, καὶ πᾶς ὁ ἀγαπῶν τὸν γεννήσαντα ἀγαπᾷ καὶ τὸν γεγεννημένον ἐξ αὐτοῦ. pas ho pisteyōn hoti iēsoys estin ho christos ek toy theoy gegennētai, kai pas ho agapōn ton gennēsanta agapa kai ton gegennēmenon ex aytoy.
2 ἐν τούτῳ γινώσκομεν ὅτι ἀγαπῶμεν τὰ τέκνα τοῦ θεοῦ, ὅταν τὸν θεὸν ἀγαπῶμεν καὶ τὰς ἐντολὰς αὐτοῦ ποιῶμεν. en toytō ginōskomen hoti agapōmen ta tekna toy theoy, hotan ton theon agapōmen kai tas entolas aytoy poiōmen.
3 αὕτη γάρ ἐστιν ἡ ἀγάπη τοῦ θεοῦ, ἵνα τὰς ἐντολὰς αὐτοῦ τηρῶμεν· καὶ αἱ ἐντολαὶ αὐτοῦ βαρεῖαι οὐκ εἰσίν, ahytē gar estin hē agapē toy theoy, hina tas entolas aytoy tērōmen· kai ahi entolai aytoy bareiai oyk eisin,
4 ὅτι πᾶν τὸ γεγεννημένον ἐκ τοῦ θεοῦ νικᾷ τὸν κόσμον· καὶ αὕτη ἐστὶν ἡ νίκη ἡ νικήσασα τὸν κόσμον, ἡ πίστις ἡμῶν. hoti pan to gegennēmenon ek toy theoy nika ton kosmon· kai ahytē estin hē nikē hē nikēsasa ton kosmon, hē pistis hēmōn.
5 τίς ἐστιν ὁ νικῶν τὸν κόσμον εἰ μὴ ὁ πιστεύων ὅτι Ἰησοῦς ἐστιν ὁ υἱὸς τοῦ θεοῦ; tis estin ho nikōn ton kosmon ei mē ho pisteyōn hoti iēsoys estin ho yhios toy theoy ;
6 Οὗτός ἐστιν ὁ ἐλθὼν δι’ ὕδατος καὶ αἵματος, Ἰησοῦς Χριστός· οὐκ ἐν τῷ ὕδατι μόνον ἀλλ’ ἐν τῷ ὕδατι καὶ ἐν τῷ αἵματι· καὶ τὸ πνεῦμά ἐστιν τὸ μαρτυροῦν, ὅτι τὸ πνεῦμά ἐστιν ἡ ἀλήθεια. ohytos estin ho elthōn di’ hydatos kai ahimatos, iēsoys christos· oyk en tō hydati monon all’ en tō hydati kai en tō ahimati· kai to pneyma estin to martyroyn, hoti to pneyma estin hē alētheia.
7 ὅτι τρεῖς εἰσιν οἱ μαρτυροῦντες, hoti treis eisin ohi martyroyntes,
8 τὸ πνεῦμα καὶ τὸ ὕδωρ καὶ τὸ αἷμα, καὶ οἱ τρεῖς εἰς τὸ ἕν εἰσιν. to pneyma kai to hydōr kai to ahima, kai ohi treis eis to hen eisin.
9 εἰ τὴν μαρτυρίαν τῶν ἀνθρώπων λαμβάνομεν, ἡ μαρτυρία τοῦ θεοῦ μείζων ἐστίν, ὅτι αὕτη ἐστὶν ἡ μαρτυρία τοῦ θεοῦ, ὅτι μεμαρτύρηκεν περὶ τοῦ υἱοῦ αὐτοῦ. ei tēn martyrian tōn anthrōpōn lambanomen, hē martyria toy theoy meizōn estin, hoti ahytē estin hē martyria toy theoy, hoti memartyrēken peri toy yhioy aytoy.
10 ὁ πιστεύων εἰς τὸν υἱὸν τοῦ θεοῦ ἔχει τὴν μαρτυρίαν ἐν αὐτῷ· ὁ μὴ πιστεύων τῷ θεῷ ψεύστην πεποίηκεν αὐτόν, ὅτι οὐ πεπίστευκεν εἰς τὴν μαρτυρίαν ἣν μεμαρτύρηκεν ὁ θεὸς περὶ τοῦ υἱοῦ αὐτοῦ. ho pisteyōn eis ton yhion toy theoy echei tēn martyrian en aytō· ho mē pisteyōn tō theō pseystēn pepoiēken ayton, hoti oy pepisteyken eis tēn martyrian hēn memartyrēken ho theos peri toy yhioy aytoy.
11 καὶ αὕτη ἐστὶν ἡ μαρτυρία, ὅτι ζωὴν αἰώνιον ἔδωκεν ἡμῖν ὁ θεός, καὶ αὕτη ἡ ζωὴ ἐν τῷ υἱῷ αὐτοῦ ἐστιν. kai ahytē estin hē martyria, hoti zōēn aiōnion edōken hēmin ho theos, kai ahytē hē zōē en tō yhiō aytoy estin.
12 ὁ ἔχων τὸν υἱὸν ἔχει τὴν ζωήν· ὁ μὴ ἔχων τὸν υἱὸν τοῦ θεοῦ τὴν ζωὴν οὐκ ἔχει. ho echōn ton yhion echei tēn zōēn· ho mē echōn ton yhion toy theoy tēn zōēn oyk echei.
13 Ταῦτα ἔγραψα ὑμῖν ἵνα εἰδῆτε ὅτι ζωὴν ἔχετε αἰώνιον, τοῖς πιστεύουσιν εἰς τὸ ὄνομα τοῦ υἱοῦ τοῦ θεοῦ. tayta egrapsa hymin hina eidēte hoti zōēn echete aiōnion, tois pisteyoysin eis to onoma toy yhioy toy theoy.
14 καὶ αὕτη ἐστὶν ἡ παρρησία ἣν ἔχομεν πρὸς αὐτόν, ὅτι ἐάν τι αἰτώμεθα κατὰ τὸ θέλημα αὐτοῦ ἀκούει ἡμῶν. kai ahytē estin hē parrēsia hēn echomen pros ayton, hoti ean ti aitōmetha kata to thelēma aytoy akoyei hēmōn.
15 καὶ ἐὰν οἴδαμεν ὅτι ἀκούει ἡμῶν ὃ ἐὰν αἰτώμεθα, οἴδαμεν ὅτι ἔχομεν τὰ αἰτήματα ἃ ᾐτήκαμεν ἀπ’ αὐτοῦ. kai ean oidamen hoti akoyei hēmōn ho ean aitōmetha, oidamen hoti echomen ta aitēmata ha ētēkamen ap’ aytoy.
16 ἐάν τις ἴδῃ τὸν ἀδελφὸν αὐτοῦ ἁμαρτάνοντα ἁμαρτίαν μὴ πρὸς θάνατον, αἰτήσει, καὶ δώσει αὐτῷ ζωήν, τοῖς ἁμαρτάνουσιν μὴ πρὸς θάνατον. ἔστιν ἁμαρτία πρὸς θάνατον· οὐ περὶ ἐκείνης λέγω ἵνα ἐρωτήσῃ. ean tis idē ton adelphon aytoy hamartanonta hamartian mē pros thanaton, aitēsei, kai dōsei aytō zōēn, tois hamartanoysin mē pros thanaton. estin hamartia pros thanaton· oy peri ekeinēs legō hina erōtēsē.
17 πᾶσα ἀδικία ἁμαρτία ἐστίν, καὶ ἔστιν ἁμαρτία οὐ πρὸς θάνατον. pasa adikia hamartia estin, kai estin hamartia oy pros thanaton.
18 Οἴδαμεν ὅτι πᾶς ὁ γεγεννημένος ἐκ τοῦ θεοῦ οὐχ ἁμαρτάνει, ἀλλ’ ὁ γεννηθεὶς ἐκ τοῦ θεοῦ τηρεῖ αὐτόν, καὶ ὁ πονηρὸς οὐχ ἅπτεται αὐτοῦ. oidamen hoti pas ho gegennēmenos ek toy theoy oych hamartanei, all’ ho gennētheis ek toy theoy tērei ayton, kai ho ponēros oych haptetai aytoy.
19 οἴδαμεν ὅτι ἐκ τοῦ θεοῦ ἐσμεν, καὶ ὁ κόσμος ὅλος ἐν τῷ πονηρῷ κεῖται. oidamen hoti ek toy theoy esmen, kai ho kosmos holos en tō ponērō keitai.
20 οἴδαμεν δὲ ὅτι ὁ υἱὸς τοῦ θεοῦ ἥκει, καὶ δέδωκεν ἡμῖν διάνοιαν ἵνα γινώσκομεν τὸν ἀληθινόν· καὶ ἐσμὲν ἐν τῷ ἀληθινῷ, ἐν τῷ υἱῷ αὐτοῦ Ἰησοῦ Χριστῷ. οὗτός ἐστιν ὁ ἀληθινὸς θεὸς καὶ ζωὴ αἰώνιος. oidamen de hoti ho yhios toy theoy hēkei, kai dedōken hēmin dianoian hina ginōskomen ton alēthinon· kai esmen en tō alēthinō, en tō yhiō aytoy iēsoy christō. ohytos estin ho alēthinos theos kai zōē aiōnios.
21 Τεκνία, φυλάξατε ἑαυτὰ ἀπὸ τῶν εἰδώλων. teknia, phylaxate heayta apo tōn eidōlōn.