What Changes When We Get Older? 

After turning 46 year old last year, I was talking with my wife about how I feel differently compared with when I was 39 years old. 

I tried to recall how I thought when I graduated at 22, when I was working hard at 29, when my daughter was borned at 31, I was divorced at 35, working to find myself again after 35.

The difference at 46 is that my time horizon when I make decisions is much longer. Actions are made by considering the longer term results and consequences. For example, the financial investments I make now is for 15 years down the road. When I organize groups to play badminton and how I think about why I play, I think about playing when I am 75 years old. I am thinking about how I would change my playing style to get ready for the next 20 years.