I believe more & mostly only in the cycle of Karma.
Because I think God, even though he is God, doesnt really have the time to monitor 6 billion humans who process a million thoughts a second & posess a million wishes in their hearts.
So, HE being the smart entity that He is, put in place a 'System'.
Maybe even an 'Algorithm' of sorts,that determines the result based on the cumulative data of our efforts, intentions, deeds, nature & behaviour / character.
This was just a flow of words, that came to my mind & I penned them down for no definite reason.
More on this, later, some other time.