ἐν τούτῳ ἐγνώκαμεν τὴν ἀγάπην, ὅτι ἐκεῖνος ὑπὲρ ἡμῶν τὴν ψυχὴν αὐτοῦ ἔθηκε· καὶ ἡμεῖς ὀφείλομεν ὑπὲρ τῶν ἀδελφῶν τὰς ψυχὰς τιθέναι.

1. ἐν
   in
2. τούτῳ
   this
3. ἐγνώκαμεν
   we have known
   have known
4. τὴν
   the
5. ἀγάπην
   love
6.  
   ,
    
7. ὅτι
   that
   because
8. ἐκεῖνος
   that one
   that
9. ὑπὲρ
   for
10. ἡμῶν
    our
11. τὴν
    the
12. ψυχὴν
    soul
13. αὐτοῦ
    his
14. ἔθηκε
    placed
    he placed
15.  
    ·
     
16. καὶ
    and
17. ἡμεῖς
    we
18. ὀφείλομεν
    we ought
19. ὑπὲρ
    for
20. τῶν
    of the
21. ἀδελφῶν
    brothers
22. τὰς
    the
23. ψυχὰς
    souls
24. τιθέναι
    to place
25.  
    .
     

In this we have known the love: that that one placed his soul for our sake, and we ought to place our souls for the brothers.