“In the tender age of childhood, when everyone is bewildered, one passes ten years. Similarly, in boyhood, engaged in sporting and playing, one passes another ten years. In this way, twenty years are wasted. Similarly, in old age, when one is an invalid, unable to perform even material activities, one passes another twenty years wastefully.” (Prahlada Maharaja, Shrimad Bhagavatam, 7.6.7)