The way you live
There are two ways to live your life.
The first one which chose by most of people is that trying not to lose or hurt from someone else. That’s because we have been evolving to survive from enemies who trying to kill us instead of getting killed. That was the law of nature.
However, if we choose to live that way, you might going to end up being some loner got nothing but greed. We should see the opportunities and take risks to get more experiences and people. You might lost something you already have or get hurt, but I am sure you’re going to earn something more valuable eventually.
There is a famous quote as you already heard.