From this moment many of his disciples went back and walked with him no longer.

So Jesus said to the twelve 'Surely you do not  want to go away too, do you?'

Simon Peter replied 'Lord, to whom would we go to? You have the words that lead to resurrection life and we have come to believe and to know that you are the Holy One of God. '

Jesus answered him 'Did I not choose you, the Twelve? And one of you is the devil. '

He said this about Judas son of Simon Iscariot. For he was about to betray him, though one of the Twelve.

Be thou my vision, O Lord of my heart;
Naught be all else to me, save that thou art -
Thou my best thought, by day or by night;
Waking or sleeping, thy presence my light.