Just because something you say is meaningless to you, doesn’t mean it’s meaningless to who you say it to. You can say what you want about words never hurting you, but the truth is they can. They can and they will. You can never know what someone else may be going through and how the things you do or say to them may effect them. 

We’ve all reached the age now where our actions are our own responsibility, not our parents or our teachers. No one else is to blame for our faults. If we all just thing before we speak, the world would be a lot more positive place. There’s no point at all in unnecessary rudeness or meanness, there’s a lot to be said for just being kind. In the long run, not only will you make others feel better, but you’ll feel a lot better about yourself.  Even if it’s just telling someone they look nice, or helping someone pick up their books, or asking someone if they’re okay when they look upset, instead of just walking right past them. Just take the time to be kind.