Jesus knew where evil thoughts come from, John 13:2

The Devil...the Source...fountain of unrighteousness from which HUMAN thoughts flow from.
The Devil PUT the THOUGHT OF betraying Jesus, INTO the heart of Judas, John 13:2.
IF you believe IN Jesus, the Truth of God, THEN you should not remain IN darkness but enter into Light, become one with the Light...John 13:46.

The Spirit of Goodness....a Fountain of Life....Life giving Living Waters.
It is not the OUTWARD man that makes him unclean...unacceptable to God.  It is the INWARD man/cup filled with unclean spirit of darkness that makes a man unclean.  MATTHEW 23:6, first make the inside of a man/cup clean SO THAT the outside of the man becomes Clean as well.

Light REMOVES darkness.   The Cleansing Spirit of God, Fire, Light...Cleanses, Removes the unclean spirit of darkness.  Light removes darkness.

ALL Powerful God.  Jesus: God has blinded their eyes and closed their minds....given men a spirit of darkness without Light and shut their ears to the Truth.  WHY?  So that the children of HUMAN fathers would not Understand and TURN TO...COME TO Me, Says God, John 12:40.  God DRAWS ONLY those Chosen, Elected by Him; He GIVES His Spirit, Nature to the SOULS of His Choice.
John ch 6...NO SOUL CAN CHOOSE God FIRST.   Jesus: you did not chose Me, FIRST I Chose you.   God KNOWS who belongs to Him...knows His OWN Sheep...lost Sheep...He Marks them WITH the Spirit, Seal...His Seal.  The SOUL led by Spirit...born again soul...comes from, Father and Returns to its Father Above.

The Devil's children, children of perdition...children of PRETENSE...hypocrites falsely claiming they belong to God.  You cannot deceive God, you may deceive the blind congregation born of HUMAN fathers...but not God, Spirit. The unregenerated SOULS born of HUMAN fathers cannot GO...where Jesus has gone, John 14:33.  Jesus KNEW that He had COME FROM...was born of God, and was going, returning to God John 13:4.  Judas the instrument, child of darkness had an inner unclean spirit, could not GO TO...return to the Father of Saints.   I know those I HAVE Chosen and you are Clean, and I know those unchosen, unclean...born of the Devil, Sin nature.

Who has MIXED in his own seed, kind among the Wheat, Chosen, Elect of God?  The enemy, Matthew 13:25...HAS DONE this...[when?]  WHILE everyone was sleeping....unconscious, unaware,
Satan deceived Eve...earthly thing and Adam CHOSE a Created thing instead of oneness with God.
The seed of Satan...spiritual seed...entered the world through Adam, its door [way in].  Separation from Goodness and Light.  ALL HUMAN seed...all generations of man...infected within Adam his flesh.   Flesh with Sin nature begets Sin natured flesh.  The "life" is in the blood.  The Sin life of Adam is in the blood of every HUMAN father.  Therefore all that is flesh dies.  But the SOUL
that is Reborn...Regenerated by God...the soul that the Holy Spirit enters...Awakes...Rises and Walks according to the INNER Light, Spirit within.  Saints think according to the Spirit within them.  The sons of perdition, pretense...fakes...think according to a spirit that pretends Righteousness and exhibits unrighteousness...according to the results it brings.  That which is born of God is not BOTH unrighteous and Righteous.  Make the cup clean or declare the cup unclean.  Light removes the unclean, unrighteous spirit of darkness.