Jesus taught in Parables. Parables are stories that act both as mirrors and windows. In a mirror we see ourselves; through a window we can see reality more clearly. The first and cornerstone parable is the story of the sower and the four soils. This parable contains the secret of the kingdom. Yet it is not easy to understand, as Jesus says, "they may have ears but not understanding." Jesus puts the onus on us to listen with an open heart so that we can enter the kingdom.