Pre-Eternity: The state of Pre-eternity has nothing to do with time. Eternity is not endless time. Eternity is No Time. Pre-eternity is the primal absolute. The state out of which all states come. The undefinable.
We can only know of it: I can know of Paris even if I have never been there. But we cannot know this state. For there is no knower and there is no known in this state.
Practice: “Oh, Sunlight what makes you dance so . . . the joy found in the soul of all souls.”
One World 
I think dualistically but am pointed towards the non-duality reality of ‘Only The One’.
I am reminded of that old joke, “You can’t get there from here.”
So how can I feel and see non-dualistically? Divine Love, which is of the nature of reflections not cause and effect. Maybe that helps. It is not something to be known for there is no knower. That helps too. It always comes back to the dissolution of the personal ‘i’s viewpoint. Which to me means — Practice~Practice~Practice Dissolving in the Stillness. Particularly these day that means The Ether Breath with Mantras. I don’t know anything.