ἐγώ εἰμι ὁ μαρτυρῶν περὶ ἐμαυτοῦ, καὶ μαρτυρεῖ περὶ ἐμοῦ ὁ πέμψας με πατήρ.

1. ἐγώ
   i
2. εἰμι
   am
   i am
3. ὁ
   the
4. μαρτυρῶν
   witnesses
   of witnesses, testifying
5. περὶ
   about
   concerning
6. ἐμαυτοῦ
   myself
   of myself
7.  
   ,
    
8. καὶ
   and
9. μαρτυρεῖ
   testifies
10. περὶ
    about
    concerning
11. ἐμοῦ
    me
12. ὁ
    the
13. πέμψας
    having sent
14. με
    me
15. πατήρ
    father
16.  
    .
     

I am the one testifying about myself, and the father who sent me testifies about me.