No, Jesus didn't lie, Man lied from the beginning by making up the god concept, we can't really consider a primary mythical effect of such concept to be a lie since that was the purpose of it all the time. Did zeus or hades lie too? Maybe who knows from a mythical perspective
Whoever fights monsters should see to it that in the process he does not become a monster. And if you gaze long enough into an abyss, the abyss will gaze back into you