Do we have Re-birth?

This is the crucial question that comes to my mind very often from my schooling. Do we decide our parents or parents gave us life? Is this universe is ruled by laws(certain) or chance? Does soul have death? Does Newton's third law (for every action there will be equal and opposite reaction) hold good for life? All the this question are interelated with each other when we try to understand about the concept of re-birth.

One fine evening when i went to beach i saw a poor little boy whose is vending ballon and other rich little boy getting it, it really disturbs me, why this disparity in economical status of these two boys? How mere birth made one rich and other poor? We can say that this disparity is by chance, but if entire universe is operated by certain laws then how could it be by chance. To through more light on this, if some one ask what is the time taken for earth to revolve sun? Then we would immediately say 365.25, we wouldn't say may 365 or 360, because every thing in the universe is operating under certain law, if so then living things in the universe would also follow certain law and ofcourse chance would not be right answer for above mentioned disparity.

If someone do bodily or wordily harm to other, will he be punished for the same, of course he should be, because as Newton said 'For every action there will be equal and opposite reaction', if it would holds good for every object then it should also be true for above case. So when would this happen, same birth or in rebirth? May be in same birth or re-birth says Karma Theory. If it in re-birth then soul would not have death. If soul doesn't have death then it should choose particular body and family in re-birth according to its past karma. So the statement parent gave us life becomes absurd. This is my present understanding of re-birth but i have long way to go for complete understanding. So i will keep on writing on this as i came know to more, so please keep reading. Hope you all enjoyed this.