Jesus taught and preached so powerfully that people actually dropped what they were doing and followed Him; but they didn’t get it.
Jesus fed thousands with a few loaves and fishes, He healed those who were sick and raised people who had died; they didn’t get it.
Jesus took those who were His most faithful followers and clearly explained the meanings of the parables and the scriptures in words they could understand; still they didn’t’ get it.
They heard the very voice of God saying He was pleased with Jesus and they should listen to Him; they saw Jesus speaking with Moses and Elijah; try as they might, they didn’t get it.
They saw Jesus killed and yet rise from the grave. They saw Jesus suddenly appear in their midst. They saw him physically rising to heaven; still they were frightened and they hid because they did not yet understand.
The Holy Spirit came. They understood fully. They went out in fear of no one and nothing and shared the good news.