Four Fold Symmetry
The first four that comes to mind are the four suits of the minor arcana. Cups (emotions), swords (thought), wands (physical action) and disks (physical items-matter) need to be adjusted in our lives.
The four suits can represent the four elements - water, air, fire and earth. These, also, need to be in constant adjustment to support life. A plant grows in the earth, needs water, extracts gasses out of the air and needs the light of the sun (fire). Any imbalance affects its survival.
The Goddess Ma'at weighs the human heart against her feather. The human heart is a four chambered organ that pumps life thru the human body. The heart adjusts its pumping rate when we exercise or when we rest.
There are the four seasons of the year. And four weeks in a lunar month.
I don't know if any of these examples are consciously reprsented on Adjustment but they are food for thought.
The number four beats within us and extends to the four corners of the earth.