ὃς ἂν ὁμολογήσῃ ὅτι Ἰησοῦς ἐστιν ὁ υἱὸς τοῦ Θεοῦ, ὁ Θεὸς ἐν αὐτῷ μένει καὶ αὐτὸς ἐν τῷ Θεῷ.

1. ὃς
   who
2. ἂν
   would
3. ὁμολογήσῃ
   agrees
   confesses, should confess
4. ὅτι
   that
   because
5. Ἰησοῦς
   Jesus
6. ἐστιν
   is
7. ὁ
   the
8. υἱὸς
   son
9. τοῦ
   of the
   the
10. Θεοῦ
    God
11.  
    ,
     
12. ὁ
    the
13. Θεὸς
    God
14. ἐν
    in
15. αὐτῷ
    to him
16. μένει
    remains
17. καὶ
    and
18. αὐτὸς
    himself
    he
19. ἐν
    in
20. τῷ
    the
    to the
21. Θεῷ
    God
22.  
    .
     

whoever confesses that Jesus is the Son of God, God remains in him and he in God.