What is unique in the world?

Birth, old age, illness and death are not the only things. Because if someone experiences birth, old age, illness and death, they will understand that death is only a moment. Can't be considered the only one. Even death is short-lived, let alone those aspects. Because the true one has unchanging characteristics. Yes, it represents eternity. So the things that many people see do not represent the things themselves. If you can understand that this world itself is from birth to death. Constantly changing. And you can find that there is an unchanging existence in it. That's the answer to the question you asked. I saw a person saying that death is the only thing, but I don’t agree. Even death is short-lived. It cannot be considered unique. In my eyes, uniqueness refers to the unchanging characteristics. Death is a form of change. Things and things change. They are formed from countless forms of each person's thoughts or other things. Because of this, this world is in a state of constant birth and death. If anyone could discover this and not be affected by this. He enters into the uniqueness. The Buddha said that one combination is indescribable. Don't dwell on these perceptions.