Question #4: why all the present religions and spiritual systems came into existence, contradicting each other when humanity is meant to follow only one religion?
Answer: Religious system means the law given by God. In every system of religion the order is to follow the instruction given by God or His representative. Unfortunately, the so-called followers deviate from the orders of the master and sometimes create their own concocted religious system. Otherwise, there can't be different religions. We therefore accept only one religion which teaches one how to love God. Any religious system which doesn't teach this, how to love God is not religion, but is cheating system. The conditioned souls who have come to this world on account of forgetfulness of his eternal relationship with God is prone to be cheated, but a person who is sincere is not cheated, but he takes up the path which leads one to the perfection of life, how to love God. The present religious and spiritual systems in varieties come into existence on account of imperfect leaders who defied the authority of God. My suggestion is therefore that the leaders who actually agree as eternal servant of God may sit together and find out the ways and means of one religious system in this world. God is one. There cannot be many gods, otherwise there is no meaning of God. In the English dictionary, you find that God means the "Supreme Being." There are unlimited number of living beings, but God is one Supreme Being. Supreme Being must be one. Nobody can be equal to Him, and nobody can be greater than Him, otherwise there is no meaning of God. At the present moment it has become a fashion to become God very cheaply, therefore, such system being very cheap and not authorized, there are so many religious systems. Otherwise, God is one, all living entities are His eternal servants, and therefore, the real religious system is to learn how to serve God.