Can someone break down what this 'personality' thing means?

Every single thing you say and do causes a little bit of your personality to chance. Considering the last 3 paragraphs, I can say without a doubt that those are my traits. I fell in love a month ago, and today I'm taking risks I never would have before. Things may go wrong, but without a little jump and faith, I would still be a lonely narcissistic shell of a man. Be bold and take what you want, but be considerate of others. Personality is just a big variable. In the end humans are all the same. The choices we make though, are what make us different. So in a nutshell, our personality is defined exactly by the things we do and say in everyday life.