Our duty is explained beautifully through the above drawing. A child's responsibility towards his aging parent. Son cradles his mum with lots of compassion as he recalls all her sacrifices and hardships as she brought him up. In Hinduism, it is an obligatory religious duty of the children to look after their aged parents and provide them with decent means of living.
Shvetashvatara Upanishad declares loud and clear to the whole humanity in unequivocal terms, that we humans are born of immortality! Needless to say, not out of sin or bondage. Human birth is the first and the biggest reward we should all celebrate every moment, unconditionally.