ἐὰν δέ τις περιπατῇ ἐν τῇ νυκτί, προσκόπτει, ὅτι τὸ φῶς οὐκ ἔστιν ἐν αὐτῷ.

1. ἐὰν
   if
2. δέ
   but
   and
3. τις
   someone
   who
4. περιπατῇ
   walks
   he walks
5. ἐν
   in
6. τῇ
   the
7. νυκτί
   night
8.  
   ,
    
9. προσκόπτει
   he stumbles
   stumbles
10.  
    ,
     
11. ὅτι
    that
    because
12. τὸ
    the
13. φῶς
    light
14. οὐκ
    not
15. ἔστιν
    is
16. ἐν
    in
17. αὐτῷ
    to him
18.  
    .
     

But if someone walks in the night, he stumbles, because the light is not in him.