καὶ ταύτην τὴν ἐντολὴν ἔχομεν ἀπ᾽ αὐτοῦ, ἵνα ὁ ἀγαπῶν τὸν Θεὸν ἀγαπᾷ καὶ τὸν ἀδελφὸν αὐτοῦ.

1. καὶ
   and
2. ταύτην
   this
3. τὴν
   the
4. ἐντολὴν
   commandment
5. ἔχομεν
   we have
6. ἀπ᾽
   from
7. αὐτοῦ
   his
8.  
   ,
    
9. ἵνα
   so that
10. ὁ
    the
11. ἀγαπῶν
    loving
12. τὸν
    the
13. Θεὸν
    God
14. ἀγαπᾷ
    loves
15. καὶ
    and
16. τὸν
    the
17. ἀδελφὸν
    brother
18. αὐτοῦ
    his
19.  
    .
     

and we have this commandment from him: that the one who loves God must also love his brother.