You thought that as you grow older this precious thing will just come to you. But it's not. People's maturity is not directly proportional to their age - a sad reality.

So how can you achieve maturity, there are possible ways: read books, education, feedbacks from others and self-introspection.

The more you study about life and have the self-awareness of your actions and stories of people, this maturity will grow.

Although I advise this, it is not a guarantee, again maturity is dependent on the individual who is facing and journeying life alone.