Isn't Existence is the only thing that make us feel as ONE.

The true essence of vedanta focuses upon subject rather than object.

Some of the verse in "AshthavakraGIta" are so powerful that will take you to the far beyond cosmos and you will feel oneness with everything in the universe and all cosmos will be projected inside you. The day you know that all the things are the object is perceivable by the subject(knower) that is you, and you are not the body not the mind but the pure consciousness that illuminates the entire world.

Never say, "O Lord, I am a miserable sinner." Who will help you? You are the help of the universe. What in this universe can help you? What can prevail over you? You are the God of the universe; where can you seek for help? Never help came from anywhere but from yourself. In your ignorance, every prayer that you made and that was answered, you thought was answered by some Being, but you answered the prayer yourself unknowingly. The help came from yourself, and you fondly imagined that someone was sending help to you. There is no help for you outside of yourself; you are the creator of the universe. Like the silkworm, you have built a cocoon around yourself. Who will save you? Burst your own cocoon and come out as a beautiful butterfly, as the free soul. Then alone you will see Truth.

In our life there is one side which is finite and another side which is infinite. I want you to think about both the sides and design the best life and stand in their true values.

In the non-dual state, God, soul and universe are essentially one absolute system which is all-pervading, uncreated, self-luminous and eternal.