If one is Everything/All then Two is like a cell splitting in mitosis. It is dynamic compared to One's all encompasing stability. Two is you and me, light and dark, day and night. Two is pairs and opposites. Two is the pairs of parts on my body: my hands, my legs, my eyes, my ears... bilateral symmetry."Then the day shone bright and rounder til the one turned into two, And the two into ten thousand things, and old things into new"