Considering the obvious and thinking symbolically:
If you take One to represent the Unity of Spirit (God), it is summed up in the number One or 1.
Every number succeeding 1 – 2, 3 – 4,567,892,319..........google.......... as far as numbers can go into infinity, will always have One or 1 hidden within it.
So, the symbolic implication is that Spirit is hidden in the diversity of all.
Further, if you think yourself an in-dividual. and become in-dividuated, this means you are no longer divided and have become One. But the mystics who reach that state, all say they have become O. (The ego is subsumed in union with the Divine Guest [Self].) The lover and the Beloved have become One. I am Thou.
And then you realize that every-one is 1 x 1 x 1 x 1 = ONE!
When we come one with One, the Buddhists say we become O but then maybe the Great O becomes more blissful. Who knows?