Why people shouldn't dwell.

Hello again!
Sorry for not posting.
People like to gloat and dwell. They do it all the time. They dwell on the smallest of their problems, on the smallest mistakes, made by themselfs and others. I cannot not say i don't do this. I am as guilty of it an anyone. However, i don't think we should do this. If we let small things pass by us, we can think about the big things. I was in a yoga class once and my teacher was talking about a simular thing. She was talking about things like, when the guy next to you is breathing to hard, and you let it annoy you. Now i don't mean that, because when people breath to loud it is VERY annoying. What i mean is more in a personal way. For one, pick your arguments. Not everything matters. There is not a book saying what does matter, because it is different for everybody. But i can say this much: it doesn't all matter. Another thing is, don't dwell on the past. The past in unimportant and once it becomes past the only thing it can do is destroy you. After you do all the stupid things you did, forget them. Otherwise they will eat you alive. Also it is about other people. The people who you care about i should say (not the breathers) You should obviously think about the people you care about, but again dont dwell. Don't dwell on the stupid things they've said, or the mean things that they did, or the really nice things either. Try to be nice, try to be heard, and don't be afraid to say sorry even if you dont mean it. I mean, if you want an rgument, dont say sorry. Arguments can be fun. But if you don't, or know that its gonna be a stupid mistake to start one, just apologize. Make them happy, so you can be at peace and relax. So what if you don't mean it????? If youre happy and theyre happy, then its all good!
By the way, i know this sounds like a command and like "i know better then you." Its not supposed to. This is all my faulty opinions.