Sri Aurobindo clarifies that “This incoercible unity in all divisions and diversities is the mathematics of the Infinite, indicated in a verse of the Upanishads,–”This is the complete and That is the complete; subtract the complete from the complete, the complete is the remainder.” ” All the myriad forms we see, are One, and the more we add forms together, the more they sum to ONE. We can divide the universe down to the very atoms or elements of creation, but we still have ONE. We can replicate and multiply forms, but they still come out to ONE. “The Infinite is not a sum of things, it is That whish is all things and more.” All these names, forms, beings, creations are not separate from one another; rather they are all part of one integrated whole.
The end of human logic and reason is at the point where we have pushed the creation to the brink and we can go no further. We see that it ever moves beyond the limits of reason, yet it has reason and organised sense to it. We eventually come to the formulas pronounced by the sages of the Upanishads when they declared “One without a Second”, “This too is that” “All this is the Brahman.” “Thou Art That”. . There is no creation beyond the consciousness of the One Existent; and everything partakes of the character of that Oneness. The Many are the One. The One is the Many. The Forms are apparently separated but in essence and underlying reality, they are One. As the Isha Upanishad puts it “All This is for Habitation by the Lord.”
reference: Sri Aurobindo, The Life Divine, Book 2, Part I, Chapter 2, Brahman, Purusha, Ishwara–Maya, Prakriti, Shakti