Life’s reactions

Would you believe the sayings from John Maxwell which states that “Life is 10% of what happens to me and 90% of how I react to it”? For me, this is always true in my life since I can’t control those things which were and are beyond my rule. The only thing that I can do is to act in response to those things that may come my way. I’m just hoping that I could react to any things in a positive manner. Not like those younger days in which I was so aggressive with solving family chaos mostly retort those people who always dragged my family down.