Quick Grasp of Faith - Part 3

How do we see? What does it mean “not to have direct experience of the real matter? Can we reach the original of the external world? Do we not also experience dreams in the mind? If we deal merely with perceptions of all matter, then what is the brain? Who or what is the perceiver? Since the material world we have experience of is actually perceptions seen by our soul, then what is the source of these perceptions? How is it that Allah encompasses everything and He is closer to us than our jugular vein?