Very often I hear individuals criticize catholicism for having mysteries or accuse the priests of being liars. Take for example the mystery of the trinity. That is our #1 thread spooler here on RF and in two other forums I used to frequent for years. How many threads have there been accusing the catholics of lying about the trinity? Jesus in the gospels speaks in weird ways people don't get and in ways people will misunderstand. He tells his disciples some nonsense about the yeast of the Pharisees, and his disciples just don't get it. And its their fault for being too dull. This is different from the sermon on the mount The sermon on the mount is easy to understand, plain.
His teaching was done in parables which the people couldn't grasp. The sermon on the mount was clear. Today it would probably be called an exegesis. Jesus also never taught his disciples everything they would need and picked on them once when they didn't figure things out for themselves. Despite speaking words that he knew would not be understood he did not consider this lying, which brings into question whether we can read anything in the gospels literally except for the sermon on the mount. And what about the way his apostles speak? Are they direct, or do they follow Jesus example? When teaching Jesus doesn't hold himself responsible for what we hear, and often he is the only person who knows what he means. The sermon is different, because it is clear and easily drawn from previous scripture or can be read as commentary on scripture.