I think, no matter what anyone says, my nephew Sae-hyun is a lovely and happy child. However, when we look at an object, it is foolish to think that the object exists in a fixed and unchanging absolute state. One afternoon, a wound on Sae-hyun's forehead lying on the sofa caught my eye. The wound that crosses the forehead vertically raised questions about its immutability. But as far as I remember, Sae-hyun was also very happy that afternoon.