Optimism is your mind actively choosing to look at the bright side.
As cliche as "glass half-empty/half-full" is...Its REAL. You choose your perspective on everything that happens in your life.
If you are able to remain calm, have perspective, and control the way you look at a situation or outcome after it has taken place, it will change EVERYTHING for you.
This mindset adaption will not be something that happens easily or overnight, but it is something beautiful and relaxing once you master it.
You either WIN or you LEARN.
LOSERS are only those who accept defeat and do nothing about it.