The first question:
What is maturity?
Maturity is knowing that nothing can be done. Maturity is acceptance of existence as it is: yatha bhutam. Maturity is not to desire things otherwise. Maturity is relaxing with the whole. Immaturity is conflict, struggle, the part fighting with the whole; the part coming into in tune with the whole, coming to a harmonious settlement with the whole – not in defeat but in understanding is maturity. Nothing can be done: to realize that is maturity.
Also: nothing matters. Allowing it deep into your heart that nothing matters, all is good as it is, is maturity. Otherwise people remain childish; when you desire you are childish, every desire is a complaint against existence. Every desire is a discontent with the way you are, the being you are and every desire brings frustration in its wake because it cannot be fulfilled. Desire brings in future and disturbs the present. And desire creates the idea of I. Otherwise there is no I. If you go within you will not find anybody there, it is utter silence; that’s what Buddha means when he says anatta, no-self. To know no-self is maturity.
Socrates says: Know thyself. Buddha says: When you will know, you will not find thyself; thyself is found only in ignorance. If you don’t know, you are. If you know, you disappear. The light of knowledge is enough to disperse the darkness of the ego.
Each desire strengthens the idea that “I am. And I have to assert, and I have to show to the world who I am. I have to prove, I have to justify myself, I have to defend myself, I have to fight. And not only fight, I have to win.” Ambition is immaturity.
It is very rare to find a mature person; if you can find a mature person you have found a buddha, otherwise all desire in different ways. Somebody desires money and somebody desires moksha, somebody desires power and somebody desires God. Somebody wants to prove in the outer world that “I am somebody” and somebody wants to prove in the inner world that “I am somebody.” The idea of evolving is immature.