have no power at all against me - neither to crucify nor to release, nor to do anything whatever against Me [Bengel].
except it were - “unless it had been.”
given thee from above - that is, “Thou thinkest too much of thy power, Pilate: against Me that power is none, save what is meted out to thee by special divine appointment, for a special end.”
therefore he that delivered me unto thee - Caiaphas, too wit - but he only as representing the Jewish authorities as a body.
hath the greater sin - as having better opportunities and more knowledge of such matters.