What is maturity?

I remembered about someone told me that I am childish. For my age, that is not a good thing. That is what he thinks. Well, after thinking about it for a while, I guess that is both true and not. It is true that have my immature characters, but I do have my mature sides,too. People don't live in a 2 dimension world. We live in a complex situation, where we can't judge something looking only from one side. For example, maybe somebody is very bad in maths, but he might be a genius with words and persuasion. Back to which side we are seeing. I, as a human, grow and become mature with experiences I got in life. But, if I ratify it, I'd be confused. I tried to ratify it once, but I end up acting like a real baby. It's all in the mind, if I might say. Hm, got stuck. I'll continue if I have the time. LOL.