The Human Body is the greatest possibility. In fact it is for that opportunity alone that a living entity receives the human body. Unfortunately almost all humans waste this golden opportunity. It will be interesting to understand what this rare opportunity is and understand the basis of that rare chance.
Sanatana Dharma is vast as the blue ocean. You cannot measure its extent, neither can you fathom its depth. It defines the whole of the universe within its fold. A person who understand Sanatana Dharma, the one who has realized Sanatana Dharma, becomes immortal. For him, there remains no unfinished duties.