48 The Jews answered him, “Are we not right in saying that you are a Samaritan and have a demon?” 49 Jesus answered, “I do not have a demon, but I honor my Father, and you dishonor me. 50 Yet I do not seek my own glory; there is One who seeks it, and he is the judge. 51 Truly, truly, I say to you, if anyone keeps my word, he will never see death.” 52 The Jews said to him, “Now we know that you have a demon! Abraham died, as did the prophets, yet you say, ‘If anyone keeps my word, he will never taste death.’ 53 Are you greater than our father Abraham, who died? And the prophets died! Who do you make yourself out to be?” 54 Jesus answered, “If I glorify myself, my glory is nothing. It is my Father who glorifies me, of whom you say, ‘He is our God.’ 55 But you have not known him. I know him. If I were to say that I do not know him, I would be a liar like you, but I do know him and I keep his word. 56 Your father Abraham rejoiced that he would see my day. He saw it and was glad.” 57 So the Jews said to him, “You are not yet fifty years old, and have you seen Abraham?” 58 Jesus said to them, “Truly, truly, I say to you, before Abraham was, I am.” 59 So they picked up stones to throw at him, but Jesus hid himself and went out of the temple.
It may be worth mentioning, the liar would have a demon who utters words upon his lips. It is lies spoken by those who do not know, or have the truth hidden from them. But the truth must be spoken. It does not matter whether we are called liar or not, the truth must be spoken.
But Jesus does not just speak the truth about being sent by his Father. He speaks the truth about keeping the word of the LORD. All must keep the word of the Lord or suffer eternal punishment. The Jews know that Abraham died and all their fathers have also died. We likewise know of very few who have not passed into death.
But this does not make Christ a liar. Humans pass into death as penalty for sin. But the Father offers life. Not in the Law or keeping rules, but through one man's death. He dies for all. He knows the true God revealed by delivering His people from death to life eternal. So we long for our Lord Jesus Christ to reveal his victory over death in his return.
Let us all not shy away from truth. Jesus Christ was before Abraham. Jesus Christ even after being crucified yet lives and reigns for you. He offers this gift of life eternal to you.