The way I talk about it is, "The All is all." Meaning, The One — and there is an Infinite One — The One IS the Many. The Infinite One is The All being all.
Infinite means "not-finite." I used to think of infinite as 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1, you know, on and on, infinitely. Infinite would be + 1, never-ending. But "infinite" actually means "not finite," which is therefore formless. Infinity is like the sky. It is really there but it is formless. A cloud in the sky is a form, but the sky itself is formless. The One, the Infinite One, is really there but it is formless. It is the Conscious Context in which all the forms are appearing. The Infinite One is infinitely individuated. The One is the Many.
So, it seems like you and I are tiny specks in the middle of Infinity, insignificant. Whereas, actually, it is pretty much the opposite of that. You are not a tiny speck in the middle of Infinity. You are Infinity, peering out through one of its infinite individuations.