Jesus answered them,
Have not I chosen you twelve, and one of you is a devil?
All Commentaries on John 6:70 Go To John 6
Cyril of Alexandria
AD 444
He continues His reproach, and clenches them with severer words, cutting off that which is slack and fallen into negligence in their desire to be wise. For He almost seems to say somewhat of this sort, "O My disciples, this is the time for heed and wit and a mind braced unto the desire of salvation. For most slippery is the way of perdition, which drags downwards not only the feeble mind, but also that which already thinketh it standeth fast. Very perilous and of many forms is sin, which bewitches the mind of man by its manifold pleasures and most smooth lusts, dragging it to what it ought not. Your own case (He saith) shall be an example of what I say. For I will tell you; none of those who from lightness have now fallen back, did I choose as I have done you who were good (for as God, I knew what was in you) yet did Satan get hold of one of you through greed of gain, and My Judgment was surely not deceived. For in man is free-will and choice to go to both, either to the right hand, or to the left, i. e., to virtue or vice." Therefore at once by His severer chiding, does He both rouse unto becoming watchfulness, and render each one more steadfast regarding himself, for He does not yet say clearly who shall betray Him, but laying the burden of iniquity upon one alone and indefinitely, He was bringing them all to the contest, and inviting them to more careful circumspection, each one dreading the loss of his own soul, and at the same time was He working another thing for the benefit of His disciples' faith. For when they confessed that they knew, and firmly believed, that He is the Son of God, He shews that He fore-knows things to come, by this too shewing as it were that their confession regarding Him was sure. For the knowledge of things to come befitteth none save One Alone, Him That is by Nature God, of Whom it is also written, Who knoweth all things before they be. But He called the worker of the Devil's will a devil, and not untruly. For as he that is joined unto the Lord is one Spirit, so is the reverse also true.
