A.T. Robertson Commentary John 16:10

"of righteousness, because I go to the Father, and ye behold me no more;" — John 16:10 (ASV)

And ye behold me no more (κα ουκετ θεωρειτε με). With the bodily eyes and without the Holy Spirit they are unable to behold Jesus with the spiritual vision (14:19). Without Christ they lose the sense of righteousness as is seen in the "new morals" (immorality, loose views of marriage, etc.).