{From himself} (aph' heautou). This kind of teacher is
self-taught, pushes his own ideas, presses his own claims for
position and glory, "blows his own horn" as we say. Jesus is the
other type of teacher, seeks the glory of the one who sent him,
whose herald and ambassador he is. {The same} (houtos). "This
one." {Unrighteousness} (adikia). Old word from adikos (a
privative and dik(885c)). Here in contrast with "true" (al(8874)h(8873)).
See  2Th 2:10  1Co 13:6  for the deceit of unrighteousness in
contrast with truth as here.