2 Timothy 2:19-20

19But the group of true believers remains strong, like the foundation under a building. God has written his message there. It says, ‘The Lord knows who his own people are.’ It also says, ‘Everyone who says that he belongs to the Lord must stop doing bad things.’

20In a big house, there are different kinds of dishes. There are some dishes that people have made from gold or from silver. They see those dishes as valuable things. There are also dishes that people have made from wood or from clay. Those dishes are not special things and they may get dirty.