Most commentators see this parable as a positive message of the growth of the church. However, deeper study shows that they have it exactly backward!
The Kingdom of God or of Heaven has past, present, and future aspects. The Kingdom parables primarily provide instruction for the present aspect.
Bitterness divides one member of Christ's Body from another. Individuals often look for a 'doctrinal' reason to justify leaving a congregation.
While the Parable of the Hidden Treasure is similar to the Parable of the Pearl of Great Price, their meanings are different. The symbols reveal the high value God places on His people.