1. Somya, before this world was manifest there was only existence, one without a second. On this subject, some maintain that before this world was manifest there was only non-existence, one without a second. Out of that non-existence, existence emerged.
2. The father said: ‘O Somya, what proof is there for this—that from nothing something has emerged? Rather, before this world came into being, O Somya, there was only existence, one without a second’.
3. That Existence decided: ‘I shall be many. I shall be born.’ He then created fire. That fire also decided: ‘I shall be many. I shall be born.’ Then fire produced water. That is why whenever or wherever a person mourns or perspires, he produces water.
4. That water decided: ‘I shall be many; I shall be born.’ That water then created food. This is why whenever and wherever there is rain, at once food grows in great abundance. It is from water that food is produced.

Chāndogyopaniṣad

And when the woman saw, that the tree was good for food, and that it was pleasant to the eyes, and a tree to be desired to make one wise, she tooke of the fruit thereof, and did eate, and gaue also vnto her husband with her, and hee did eate.

Genesis 3.6

He was not at all happy. Therefore people (still) are not happy when alone. He desired a mate. He became as big as man and wife embracing each other. He parted this very body into two. From that came husband and wife. Therefore, said Yājñavalkya, this (body) is one-half of oneself, like one of the two hálves of a split pea. Therefore this space is indeed filled by the wife. He was united with her. From that men were born.

Brihadaranyaka Upanishad 1.4.3

“Cosmically we find that matter organizes around centers, which are often marked by a dominant mass. Such systems come about wherever their neighbors allow them sufficient freedom. In the vastness of astronomical space the rotating galaxies and the smaller solar or planetary systems are free to create such centric patterns, and in the microscopic realm so are the atoms with their electrons circling around a nucleus.”

Arnheim, The Power of the Center

Bless us, divine number, thou who generated gods and men! O holy, holy Tetractys, thou that containest the root and source of the eternally flowing creation! For the divine number begins with the profound, pure unity until it comes to the holy four; then it begets the mother of all, the all-comprising, all-bounding, the first-born, the never-swerving, the never-tiring holy ten, the keyholder of all.

Mystic Tetrad