We are emotionally mature when we can modulate our own emotions.
And we are intellectually mature when we can critique our own culture.
The problem is that we all want a better house, a better car, a better job, better qualifications or even a better spouse, but no one want to be more mature.
This is because maturity invisible. We toil up the mountain of maturity for most of our lives, and it is only when we reach the top that we can see the view.