Dustin at this point had been travelling through this endless darkness for more than two months and some weeks, and it was showing absolutely no signs of ending soon. The good for now was that what seemed like he wasn't moving had stopped, and he could actually see himself getting closer to the lit part ahead of him.
After a few more days of none stop travel, Dustin finally got to the lit part, and truly it was like the sun was near. The cold was still very present, but he could tell that what produced the light in the sky was the sun, even though he still hadn't seen it over the horizons.