ὁ μὴ ἀγαπῶν οὐκ ἔγνω τὸν Θεόν, ὅτι ὁ Θεὸς ἀγάπη ἐστίν.

1. ὁ
   the
2. μὴ
   not
3. ἀγαπῶν
   loving
4. οὐκ
   not
5. ἔγνω
   knew
6. τὸν
   the
7. Θεόν
   God
8.  
   ,
    
9. ὅτι
   that
   because
10. ὁ
    the
11. Θεὸς
    God
12. ἀγάπη
    love
13. ἐστίν
    is
14.  
    .
     

The one who does not love did not know God, because God is love.