Of course you wouldn't cover up a lamp. That would defeat its whole purpose. The purpose of a lamp is to give light. The reason to have light is so that everyone can see. You cover it up, nobody can see anything.
Nothing is secret, unless someday it's going to be out in the light.
We may not understand everything now. But someday, we will. Some things we don't even see at all. But God doesn't hide things, just for kicks. God is not in the secret-keeping business.