Your world is all these elements. Of light and sound, of taste, smell, and touch, woven together in many dimensions on the fabulous loom of your brain. Your brain; the most complicated thing in the world, which you yourself grew...without even thinking about it.
We are living in a culture entirely hypnotized by the illusion of time, in which the so-called present moment is felt as nothing but an infinitesimal hairline between a causative past and an absorbingly important future. We have no present. Our consciousness is almost completely preoccupied with memory and expectation. We do not realize that there never was, is, nor will be any other experience than present experience. We are therefore out of touch with reality.
A person who thinks all the time has nothing to think about except thoughts. So he loses touch with Reality, and lives in a world of illusion.