Urvashi Kaushik

No one can say very confidently there is a life after death.In every religion there are different examples written in Gita,Bible,Kuran or any other religious books but no one knows there is a life after death because once people dies we never knows where the soul goes.My question is that how any one can proved there is a life after death.I am sure there is very big question mark arises.Once people die we just pray for departed soul but we don't have any ideas where the soul goes.