What are some turning points in life that give us life lessons?

1. Failure (Academically)
2. Break up (Specially with unworthy lovers or cheaters)
3. Financial lows (They make you realise the value of philosophical piece of paper).
4. Accidents (You realise value of free things like movement provided to us).
5. Loss of loved ones forever.
6. Loss of health

What should be the most important thing in your life?