In Human Design, the Primary Health System (PHS) uses "Variables" (also called the Four Transformations).
PRL DRL refers to two of the four arrows:
Bottom Left (DR): Design Internal. Your brain is Active (Left-facing). It needs high-quality fuel and consistent engagement to thrive. human design variable prl drl
Environmental Sensitivity: Being in the "correct" environment is critical for your cognitive health. Because your body is strategic (Left), it needs a specific physical place to function, which then allows your passive mind to see and observe correctly. In Human Design, the Primary Health System (PHS)