The apostles get a lot of eyes rolling and foreheads slapped because they appear to be somewhat dense. After all, they were right there with Jesus every day, they saw all that he did and heard all that he said. How could they NOT get it?
But would you have done any better? Are you now doing any better? What Jesus did and said is so far beyond anything that you or I could ever dream up, so far beyond our preconceived notions, our ken, that it’s no wonder at all that we (and they) didn’t get it.
Jesus knows this, he worries, he is concerned he tries to prepare us, but it’s never going to be easy. There is nothing ordinary about ordinary time.