Did you know that there are things in this world that are visible and things that are invisible? It is not limited to supernatural things such as gods and ghosts, but is actually something that exists in our daily lives! It's called "human feelings," and we foolishly live under the illusion that we can see them, without really realizing it. We forget that our conceit has created a "distorted relationship" between people. Since we have language, the secret to smoothly running your immediate and global world is to keep communicating with each other, how the other person feels, and what words to use to convey your thoughts. The world is like a huge millstone, and in front of you is a huge support rod to turn it. It is not something that you can turn by yourself, but you have to work together with others (your neighbors, people you don't even know on the other side of the millstone) to turn it. In such a dense world, sometimes you will get your foot stepped on, but when that happens, you should offer your other shoe as well!