What is Elie Wiesel's main message to both young and old?

If you had used Google, you'd have had your answer 20 minutes ago!!

https://www.google.com/search?q=Elie+Wiesel%27s+main+message&oq=Elie+Wiesel%27s+main+message&aqs=chrome..69i57j69i60.1160j0j7&sourceid=chrome&ie=UTF-8