I also learned that whenever and wherever the Lord or His angels appear, the adversary and his minions are likewise permitted to tarry (either to precede or to follow). There must be opposition in all things! (2 Nephi 2:15-16.) The faith that allows one to pierce the veil of heaven also permits the adversary to make his subtle appeals and present his perverse proposals. (Matthew 4:1.) One who sees God is also given to gape into the very jaws of hell. (Doctrine & Covenants 76:44-48.) There is no light without darkness. (Moses 2:4.)That last phrase stuck in my mind, as passages of scripture have at other times, and I kept turning it over and over, until I realized that it was inverted. Light is not dependent on darkness for its existence. Light is more powerful than darkness. As a good friend is known to say, "When you walk into a dark room and flip the light switch, the darkness doesn't get to argue."
Light exists without darkness, because light is a positive, active, living force. Darkness is the absence of light. It is what exists when something blocks light, when something stands before it.
So, in my own mind, that last phrase reads thusly:
"There is no darkness without light."