The water that flows up and down your spinal cord and throughout your brain; that flows in your blood and lymph plasma; that hydrates your fascia, tissues, and cells; transports energy and information in the form of electricity or vibrations, to govern the power of mind, body, and consciousness.
Any blocks through poor sleep, inflammation and infection, poor breathing mechanics, lack of meditation and stillness, blocked emotions, or tight muscles (eg., sitting down too long, or tech neck) all have the potential to block this flow of communication — leading to negative effects within the mind, body, and most importantly, lowering your state of consciousness.