1. There is no magic that will change human nature.
2. Rules that keep people from harming others are very important.
3. Don't expect to live a "special" or "great" or "revolutionary" life. Aspire to something extraordinary if you see an opportunity, but ordinary things like health, moderate wealth, and family are also good enough, and will have to be good enough for most people. And there is something very special in simply living a very good ordinary life.
4. Try not to be pushed into doing things that corrode the moral goodness within you. You will not regret spurning material rewards to live in accordance with your values, but you will regret the opposite.