A little girl picked up a potato and said, "Look, Mommy, this potato is so big and nice, isn’t it?" Then the mother peeled it and cut it in half. How surprised was the little girl when she saw it all black and hollow in the middle.
There are many in the church like that. Outwardly they look great, they look like they are growing, they look healthy because they have all the outward signs of being a Christian, just like that potato had all the signs of being a good edible potato. Inwardly though many are rotten and hollow, and need Christ to take over inside them to make them clean. Jesus is the cure for a rotten inside.