As Jesus was speaking, one of the Pharisees invited him home for a meal. So he went in and took his place at the table. His host was amazed to see that he sat down to eat without first performing the hand-washing ceremony required by Jewish custom. Then the Lord said to him, "You Pharisees are so careful to clean the outside of the cup and the dish, but inside you are filthy — full of greed and wickedness! Fools! Didn't God make the inside as well as the outside? So clean the inside by giving gifts to the poor, and you will be clean all over."
— Luke 11:37-41 NLT
In the previous verses,  Jesus warned that what we assume as light in us can actually be darkness. Then, he warned the people who had invited him over for a meal that they should take a look inside themselves. They were spending a great deal of time, energy, and worry over being clean outside. While being clean outside was good, the bigger issue was on the inside — whether their hearts were clean. Knowing them and their values, Jesus challenged them to do something that would reveal just who they really were, inside and out. He spoke to their greed. While they may have looked religious and righteous on the outside, he knew that greed was consuming them on the inside. In our age, Jesus' challenge still stands — take a look on the inside. And the monster on the inside for a lot of us today is still the same: greed.
Father, forgive me for my greed. I know that many of your children live with joy in the midst of poverty. I know many of them are far more generous than I am. Open my heart and cleanse me through and through. Make me more generous with others, just as you have been generous with me. Thank you for all of my blessings, in Jesus' name. Amen.