εἰ μὴ ἦν οὗτος παρὰ Θεοῦ, οὐκ ἠδύνατο ποιεῖν οὐδέν.

1. εἰ
   if
2. μὴ
   not
3. ἦν
   was
4. οὗτος
   this
5. παρὰ
   from
   beside, among
6. Θεοῦ
   God
7.  
   ,
    
8. οὐκ
   not
9. ἠδύνατο
   was able
10. ποιεῖν
    to do
11. οὐδέν
    nothing
12.  
    .
     

If this man was not from God, he was not able to do anything.