Everything has Buddha-nature and can become a Buddha, as it is said in the Nirvana Sutra. Buddhism talks about cause and effect. If all living beings follow the path of Bodhi, they will naturally transform from saha to bliss. If they commit serious sins in this life, turning into insects and flies in the next life is an easy retribution. If they fall into the realm of hell, hungry ghost, or Shura The Tao is that the crimes are too numerous to be recorded, and they should have been irreparable. Furthermore, dirty and ugly are not definitions added by people themselves. The insects and flies may not feel any discomfort. On the contrary, sometimes people feel confused because of their own thinking. Lu Chunyang has such a famous saying: It is easy to save all living beings, but difficult to save others. It is better to save sentient beings than to save others.