We know that God's thoughts are not our thoughts, nor are our ways his ways. (Isaiah 55.8.) We also know that God sees what's in our heart and we don't. I had traveled and seen many buildings that were beautiful and magnificent, and some cities were full of them. They could be cathedrals, palaces, museums, hotels, business centers, shopping malls, etc. Since I couldn't look inside people's hearts, everything looked good. If I could have seen as God sees, I would have been most likely shocked and never want to look at people (and myself) again. But we do know what's in our own heart. So if we can all make our own heart clean and pure, we'll have a truly beautiful world in God's eyes.