All spiritual disciplines implore us to live in the present: to break habits, abandon conditioning and live authentically, here and now. However, to live selfishly, hedonistically, here and now, at the expense of the future, at the expense of our childrens planet, is not what they mean. This is the difference between the presence of a master and the presence of a child. The child's spontaneity is because it has neither fear nor thought of past or future, whereas the master's spontaneity is the result of his embracing both past and future and funneling them into the present. This is what we call growing up or understanding and it is the source of the master's gravitas. In some way they really do have the weight of the world on their shoulders.