Most people don't grow up. Most people age. They find parking spaces, honor their credit cards, get married, have children, and call that maturity. What that is, is aging.
If my theory of relativity is proven successful, Germany will claim me as a German and France will declare me a citizen of the world. Should my theory prove untrue, France will say that I am a German, and Germany will declare that I am a Jew.
A human being is a part of the whole called by us universe, a part limited in time and space. He experiences himself, his thoughts and feeling as something separated from the rest, a kind of optical delusion of his consciousness. This delusion is a kind of prison for us, restricting us to our personal desires and to affection for a few persons nearest to us. Our task must be to free ourselves from this prison by widening our circle of compassion to embrace all living creatures and the whole of nature in its beauty.
I will not propose to you that my way is best. The decision is up to you. If you find some point which may be suitable to you, then you can carry out experiments for yourself. If you find that it is of no use, then you can discard it.
As free human beings we can use our unique intelligence to try to understand ourselves and our world. But if we are prevented from using our creative potential, we are deprived of one of the basic characteristics of a human being.