7,

The flow moving from right to left represents a passage from the present into the past.

A person living in the modern age, a person striking a yoga pose at the center, a temple submerged in the Ganges River, creatures of the Cambrian period, the towering fungi of the Devonian period known as Prototaxites, and the sea.

As we move farther into the dizzying depths, the path ultimately leads us to the center of all things.