In the parable of the Four soils, Jesus teaches his followers about why there are so many different types of responses whenever the truth of the gospel is preached. Jesus explained that in order to correctly respond to His teachings we need The Spirit, understanding, and devotion. A correct response to Jesus' teaching leads to a life of fruitfulness.
In the parable of the Workers in the Vineyard, Jesus reveals himself to be a King of Grace rather than a one of fairness. We learn that grace is an incredible attribute of Jesus and how his grace impacts his relationship with us.