The reasons people did things were too complex, and frequently hidden even from themselves.

This thing could be hiding almost anything from her.

"The first thing I'm going to do is run away from all of you people and hide for awhile."

So it's like this thing is hiding these documents for some reason.

These things I hid in the forest near my work.

Just the thing to hide someone looking down at us, he thought.

Who could say what strange, exciting things might be hiding in the room below?

Soon they became the place where other things could hide.

Further, other critics point to the fact that most people do have things to hide.

The thing that killed poor John may still be hiding up there.