As he dives into the tunnel, he finds himself in a narrow cave in which no light penetrates. As he navigates through the tunnel, he wonders, “ if the tunnel might be filled with weed that could tangle him” (Lessing). The weeds inside the tunnel represent a risk that obsession poses to people. People who are obsessed may pass through the tunnel and make it out of the other side alive. It is a risk that obsessed people go through and they may be perpetually stuck in this endless goal. The tunnel is similar to a bottomless pit. The person who is obsessed may never recover from it.
Another obstacle that Jerry faces in the tunnel are the small jagged rocks on the side of the tunnels. When he first dives into the tunnel, he recognizes that the “roof was sharp and pained his back” (Lessing). The roof is filled with roof rocks that constantly stabs him while he swims across the tunnel. It represents what a person will put himself through when obsessed. They are perpetually trapped in a tunnel that brings them constant