By default, the head is closed, and the heart is slightly open. If you take THC without potentiators, then euphoria is mostly bottled up but will leak out uncomfortably. You can take a heart potentiator without doing anything for the head (e.g., only H4CBD). If you take a head potentiator without doing anything for the heart, then discomfort will accumulate in the heart. There is a head/heart balance and a heart open/closed balance.
Frankly I have no idea interpret that