Why are the forties sweet spot?

VIDEO:
https://d.tube/v/ourhappyplace/e6k4usdv79v

I'm in my forties, and I don’t feel old.
I mean, don’t get me wrong, I know I am not young anymore.
My body reminds me of that every morning. When I wake up, my body feels stiff, and I have to worm it up just to function properly during the day.
But still, I don’t feel old.
How is that?

When I was in my twenties I didn’t need to do much to stay fit and healthy. But now I have to be careful what I eat to stay healthy and I have to exercise to stay fit.
Ok, maybe my body is not what it used to be, but I have something else, something that I didn’t have when I was younger. And I wouldn’t trade it for youth again.
And that is life wisdom.

When I was young I didn’t have much life experiences. which is normal. And I did a lot of stupid things. I didn’t know how to have good relationships, how to make money, how to take care of myself. I learned that through trials and failures. And with time and life happening to me, I gained wisdom.
Now I know who I am, what I want and because of that I have a better life.

I think that being forty is a sweet spot.
You lived enough life to gain life experiences and wisdom. That makes your life more enjoyable and jet you are not too old, so your body is still fit and capable of having many adventures.
I would like to say to anybody who wants to enjoy their middle age:
Take care of your body because you will need it to enjoy life.
Learn from your life experiences and gain life wisdom.
That will make you feel calmer less worried about life in general. It will make you feel good and happier.
Practice appreciation for everything you have and you have already achieved in life and at the same time be eager for more new adventures.