The sun rises and sets. The moon waxes and wanes. And fire could be extinguished or burn out. There is no light can shine forever and everywhere.
Don’ take what your rely on for granted. You have to get prepared and light your own fire. The more you are independent from others’ light sources, the more freedom your get even in the darkness. You are your own sun. Glow wherever you go, then the darkness won’t bother you anymore. There would be no dark places surrounding you when you start facing the darkness. Go forth. Don’t be afraid. Go forth and shine.