Lifes to short to worry, but I know what you mean. As you get older, you will realise that things turn to your maturity level, and you tend to express your thought and feelings in such a way, which you may or may not regret later, and especially after you have pressed that send button, verbal or otherwise. Personally I am at the 'tender' age, when I don't give a dam to most things .Take a point in question. You only have to look at Gandalf the magician [grumpy but sensible and wise 'person'at times ;o)].
What brought this on then, someone been having a go at you, which we should perhaps know about!.