First of all, he spoke in parables to reveal his identity. Here is a statement: Truth embodied in a tale shall enter in at lowly doors. Howard Hendricks at Dallas Theological Seminary always talked about it this way:
When you preach, especially to young children, make sure you put the cookies on the bottom shelf. In other words, put it at a level where they can grasp it. The parables do that. They reveal Jesus in very simple termsin terms that we follow. He has our attention. Stories do that, right? They keep your attention, your interest, all the way to the very end, to the conclusion of the story. He puts the cookies on the bottom shelf to reveal who he is. That is also why he said, He who has ears to hear, let him hear (
Matt 13:9). The assumption is that some people here have ears to hear. Some people in his audience were prepared and ready to listen, and so this parable will reveal Jesus Christ to them. That is why I advocate teaching parables to your children. There are about thirty-five parables in the New Testament spoken by Jesus. Take one a week and walk through it with your children or your grandchildren, teaching them these stories about Jesus. He is putting the cookies on the bottom shelf so that even children can understand the simple truths captured in the story.