Everything in life is temporary. So if things are going good, enjoy it because it won't last forever. And if things are going bad, don't worry. It can't last forever either. The best collection of quotes and sayings for every situation in life.
“Some people cannot stand that you’re moving on with your life and so they will try to drag your past to catch up with you. Do not help them by acknowledging their behavior. Keep moving forward.” – by Dodinsky