This Psalm talks about planting seeds. Sowing with the expectation that God bringing about the harvest. Verse 5 says that sometimes you sow those seeds with tears in your eyes.

Jesus’ point is that a seed can start out small, but like a weed, grow to takes over the garden. Why should our faith become so obvious? Because the kingdom of God is a matter of goodness, ministering to the needs of others, and social action.