The joy of childhood is pure. The pain after growing up is complicated. more grown, more lonely. When we were young, in places where no one was, we could be very happy because of the company of flowers and plants. When we grow up, the more we are in the crowd, the more lonely we feel because of unpredictability. Simplicity is the great realization of life. No desires, no desires, no disappointments, come and go with little effort. Simplicity is the greatest happiness.