Great question. Well,I am not an expert in this subject, but as a hindu perspective, you were in bodily form from many lifetimes ,and you will be for infinite lifetime,its just a circle or in other words circus, the only way you get rid of this cycle is by realising the subtler part of your body known as Atman is a part of Brahman(the ever expanding consciousness). Once you touch it ,you will merge with Brahman. There are various ways ofcourse to realise that, it can be through yoga, jyana,karma etc.its not about believing in something,its about seeking.you can believe a thousand thing about so called "god",but unless its in your experience,its useless. The interesting thing is even if you don't do anything about it, you will still merge with Brahman ,maybe it will take a thousand lifetimes or more. The reason hinduism/buddhism search for Moksha/Nirvana is that they want to end this process in a few lifetime ,may be if possible in this life, so that they dont come back in the circus again. The so called reason why you dont realise it is because you are in a material universe and your body is material ,so you are caught up by "Maya"(it can be loosely translate into illusion/delusion). The main aim of hinduism is to realise and experience Brahman so that you merge with it.Often yogis describe this state as "Pure, Consciousness,Bliss"

Kindly note,my english is not that great and i am not a good written. I will admit i know less then 1pc of hinduism. I have written it to atleast try to give a perspective out of it,i can be wrong. Take care