The parable teaches us that the Kingdom of God is a mixed bag. It is composed of saints and sinners. The Church is not a showcase for saints, but a refuge for sinners. Jesus came, not for the just, but for the sinners. Catholic means universal. The Kingdom is a mixed bag because reality is a mixed bag good and evil are found together. Each one of us is a mixed bag. Yet, God is patient and merciful. He wants everyone to be saved and come to the knowledge of the truth. There is always the possibility of conversion, God also wishes to give us a second chance.
If Simon Peter had been uprooted when he denied three times that he even knew Jesus there would be no St. Peter. If Saul had been uprooted while he was on his way to Damascus to persecute the Christians there would be no St. Paul. If Thomas had been uprooted when he refused to believe that Jesus was risen there would be no St. Thomas. And what about Augustine, Francis, Ignatius? What about us? If we had been uprooted when we were sinners this church would be empty.
This leads me to ask - when was the last time a little "pruning" took place in your life through the Sacrament of Reconciliation. Consider learning a little more about it and consider celebrating it soon.