Lent With Saint Thomas More

From The Sadness of Christ:

And his disciples went with him.
It is to be understood of the eleven only which still remained with him. For the twelfth, whom
the devil entered into after he had eaten the sop, and carried forth from the residue of the apostles,
waited now no longer upon his master as his disciple, but like a traitor laboured to destroy him. And so
proved these words of Christ too true: ‘He that is not with me is against me.’57 For against Christ was he
indeed, even at that time most especially, craftily contriving his destruction, when the rest of his
disciples went after him to pray with him.
Let us follow Christ therefore, and by prayer call upon his Father with him. And let us not, as
Judas did, slip aside from him, after we have been relieved by his gracious goodness, and well and
liberally supped with him, for fear this saying of the prophet be verified in us: ‘If thou sawest a thief
thou didst run with him, and with adulterers didst thou pay thy shot.

Judas heard the preaching of Christ, witnessed His miracles, was chosen as one of His Apostles, and still betrayed Him.  Without love of Christ, knowledge of Christ is useless.  As Saint Paul noted, the demons know who Christ is.