Life is all about choices. It's all about living life to the fullest. All the choices you make will change how your live is going to be like. Even a small decision of talking nicely or badly to someone will change your life inevitably.
Don't underestimate the power of such a small decision. Just because you make a small decision like that, means you're more likely to commit it again and again. The more you talk nicely to people, the better your character will be. Everything is about being nice to people. Be nice to people, capture a good character in you.
A bad character will get you nowhere. However high you climb, you will fall eventually. It is all about humanity.
Treat others like how you want others to treat you