Jesus begins teaching in parables, stories used to teach spiritual lessons. Jesus was using what they knew, primarily farming terms, as a way of giving understanding about the Kingdom of Heaven.
The parables of the week involve a man selling everything he has to buy a field that holds treasure of great value, and a merchant who sells everything to purchase a pearl of great value. This sermon asks us to question what we are chasing after and what we value most. Additionally, we realize we are a people who love value, but not necessarily paying the associated cost.