“To exist is to change, to change is to mature, to mature is to go on creating oneself endlessly.” – Henri Bergson
***
“The mark of the immature man is that he wants to die nobly for a cause, while the mark of a mature man is that he wants to live humbly for one.” – Wilhelm Stekel

It’s true, we become mature when we go into a process of change. We live, we gain experience. We change in reaction to disappointments, failures…. Life is so hard and at the same time so generous cause we have always the possibility to change. Maturity is a long path that opens up new ways of seeing life, the self and the others.
Excellent comment… thank you.