"The kingdom of heaven is like ..."
Jesus taught about that time after time. I can find eight places in the Gospel of Matthew where Jesus started to teach by saying, "The kingdom of heaven is like ...". He found one way after another to explain it to us. He focused his teaching efforts to make sure we could grasp it. Even if I haven't grasped everything he said, I've grasped this much: Jesus knows what the kingdom of heaven is like. He knew what he was talking about. He didn't come across as someone who guesses or speculates, either. He came across as someone who knew.
The kingdom of heaven is not just the hidden treasure of the parables. The kingdom of heaven is also the point of repentance:
"Repent, for the kingdom of heaven is near."
The kingdom of heaven is worth changing our lives for. The kingdom of heaven is where we are called to belong. For Jesus, calling us to repent isn't about calling us to be respectable and responsible. Those are good, but Jesus us calls us to something better.