The human body exists in physical reality, in the realm of space-time and mass-energy. Physical reality is persistent, operates uniformly, and is constrained by locality. Physical reality is discrete and quantifiable, and it resists subjectivity.
Human consciousness exists in metaphysical reality, in the realm of thought and imagination. Metaphysical reality is evanescent and variegated, it is malleable without restriction and responsive without delay. Unlike the countable infinity of physical reality, metaphysical reality is endlessly, continuously infinite. There is no entity in metaphysical reality so singular that it cannot be infinitely expanded and complicated. There is no distance in metaphysical reality so small that it cannot be endlessly and recursively pried apart to reveal further infinities of distinction.
The contrast between our interactions with physical reality and metaphysical reality is core to our experience of being. To be human is to be simultaneously frustrated by the inertial resistance and claustrophobic locality of physical reality, and the intransigence and weakness to subjectivity of metaphysical reality. To be human is to desire that physical reality respond to one’s whims as readily and completely as metaphysical reality, and to desire that metaphysical reality persist and persuade as stubbornly as physical reality.