Jesus calls the devil a 'liar and the father of lies.' Why is this so central to his identity and his opposition to truth?
Truth is not merely something the devil avoids; it is fundamentally alien to him. 'He does not stand in the truth, because there is no truth in him.' As the commentators explain, truth is not his native environment; it's a foreign sphere. Instead, falsehood is his element, his natural habitat. 'When he lies, he speaks out of his own character.' His lies aren't accidental; they are expressions of his very being.
This makes him the 'father of lies' – the originator and sustainer of all falsehood. The religious leaders' inability to hear and accept Jesus' words, despite His speaking the truth, demonstrates their kinship with the devil. Their rejection of divine truth and their adherence to their own traditions or interpretations reveal that they, like their father, have no truth in them. This highlights the critical importance of guarding our hearts and minds against deception and actively pursuing God's truth.