What does John 18:20 mean?
Jesus enemies are putting on a show, going through the motions of a trial, when they've already condemned and sentenced Him in their own minds (John 11:57; Mark 14:1–2). Jerusalem's religious leaders intend to paint Jesus as a blasphemer in the eyes of Israel, and a rebel in the eyes of the Roman Empire. Part of that sham will involve false witnesses (Mark 14:55–59). It also includes asking Jesus to explain His teachings (John 18:19).Christ's response is matter-of-fact. He also appeals to the idea of a fair trial (John 18:21). In short, Jesus' response is to say, "everyone knows what I teach, so where is your evidence I've done wrong?" In truth, it has been Jesus' public teaching and conflict with these very religious leaders that has earned their hatred (John 7:26; Matthew 22:46). Even though Jesus will submit to their abuse (John 18:22) and condemnation, He will leave them no room to plead ignorance.