This is mentioned in the quote, “change is the only constant,” which he mentioned in his book titled ‘Fragments.’ Over the years, this saying has been molded to “The only constant in life is change.”
The words were first spoken by Heraclitus in the book Fragments. He asserted that life is always in flux. He had a similar philosophy as Yin and Yang in Taoism. I know the notion has often haunted you.
According to Buddhist teachings, we are made of little deaths—this means that we die every moment and we are born at the same time as well. The greatest of all impermanence is death. We are born, we live, and then, when the time is right, we die. This alone should inspire us to accept the truth of change.
https://themindfool.com/change-is-the-only-constant/