The one eternal religion is applied to the opinions of various minds and various races. There never was my religion or yours, my national religion or your national religion; there never existed many religions, there is only the one. One infinite religion existed all through eternity and will ever exist, and this religion is expressing itself in various countries in various ways.
Swami VivekanandaThere cannot be two almighty beings in this world. [Imagine having] two or three Gods; one will create the world, another says, "I will destroy the world." It [can] never happen. There must be one God. The soul attains to perfection; [it becomes] almost omnipotent [and] omniscient. This is the worshipper. Who is the worshipped? He, the Lord God Himself, the Omnipresent, the Omniscient, and so on. And above all, He is Love. How is [the soul] to attain this perfection? By worship.
Swami Vivekananda