Here's a few reasons why:
1. Happiness covaries with feeling responsible for everything that happens to you.
If you believe you're responsible for what happens to you, you'll believe you have the power to change things.
If you believe you have the power to change things, you’re more likely to try.
If you’re more likely to try, you’re more likely to succeed.
2. Happiness covaries with clear thinking.
Feeling anxious?
Stressed?
Angry?
Try making good decisions.
Personally, stressed, angry, anxious Kareem often makes decisions calm Kareem regrets.
The best part about all of this is it applies regardless of your life circumstances.
It's been just as true when I've had objective "peaks" in my life as it has been when I've had "slumps" including suffering irreversible health conditions.
Agree? Disagree? Let me know your thoughts.