Sisyphus wrote: "BUT learning attitude is also an indication of being open to new experiences=Curiosity. The most human trait that defines us -- and we pay dearly (in diseases and early disability both mental or physical) when we let it starve."

Yes!
Our minds can be continuously growing, our horizons can be ever expanding.
At 75 my mind-world is the largest it's ever been, and perhaps it will continue to grow until my last day. The thoughts with which I reach out are more gentle and accepting of all I perceive.
I can't do much to change the world, but I can try to know and love it better.