If I bear witness of myself, my witness is not true.
If I bear witness of myself, х peri (G4012)] - 'concerning Myself;' that is, in the sense already explained-standing alone, and setting up a separate interest of my own.
My witness is not true.
Related Commentaries of John 5:31
John 5:31
31 If I bear witness of myself, my witness is not true.