Also notice that the center of the web is always small (you), and the web ever expanding (your possibilities).
Spider cautions us not to get locked into the illusion that has made you what you think you are. Our behavior, and our belief systems, and our view of ourselves is locked into an illusion of who we truly are that was created for us by others; usually starting as a small child. As we grow, our life becomes a reflection of those illusions, and those of us who do not follow that pattern are "rebels" or "black sheep" or other terms that imply non-conformity.
We are locked into that illusion because it has become our "comfort zone", and it is our fears of the unknown and untested which keep us in that zone. It is far easier to live in the hell we know, than to stick our mental and emotional toes out into the world and chance discovering that there is another way which may be better for us.
Spider is telling us that the possibilities for each of us is only limited by our own view of ourselves. Notice that the web constantly grows, outward, still connected to that small center space. It is always reaching, always expanding, never satisfied with the status quo. When something of value get caught in the web, it is taken back to that small center and utilized; never wasted. It may be stored for later use, but it is never wasted.
The next time you come upon spider weaving its web, stop to really look. Notice the beauty and symmetry and balance; the careful and intricate design. Spider is telling you to have the courage to reach out and create your own tomorrows; to break out of the illusion that has you locked in a time-step, and discover who and what you truly are."