Differentiating the Factors
Of course, some of these factors can be seen, and their force is perceivable, like the air that can be liquefied then solidified, or sunlight that can be seen, or thunder that can be heard when clouds crash into one another. However, there are many other factors in space that human beings are currently incapable of seeing with our current scientific capability. There are billions of different effects in the sunlight that humankind cannot see or measure. You can, however, perceive its power and force, but only partially; we cannot see many other effects of it. These forces are interacting in the depth of everything, including the human body.
These two sections of materialistic and spiritual factors (that act as positive and negative poles) join hands to establish a universal life.