What's absolutely impossible to prove is the idea of innate and everlasting equality.
In life, friendships change, divorces happen, people move on, others die. Money and jobs will come and go. Live long enough and your health and body will change. It goes with the territory of being human. The fact that you are still here gives you an advantage. Don't look back. Look straight ahead!! Decide to use all of your knowledge, skills, experiences and your life lessons from your mistakes, defeats and setbacks, to start over again. Life changes. You may not have the same life as before, but you can still enjoy your life!