Luke 11:39

‘And the Lord said to him, “Now you the Pharisees cleanse the outside of the cup and of the platter, but your inward part is full of extortion (‘greed') and wickedness.” '

Jesus is aware of what the Pharisee is thinking/saying and draws attention to their inconsistency. They cleanse the externals, such as the outsides of cups and dishes, and through their ritual by implication the outside of the body, but they ignore contamination of the inward parts, contamination of the heart of man (compare Mark 7:14). There is an outward show of cleanliness, while underneath is a turmoil of greed and wickedness. The light such as it is may shine on the cups and platters to see if they are clean, but not on the heart. Note here that He speaks as ‘the Lord', which is fairly common in Luke whose aim is to maintain His distinctiveness from all others.