You might be being watched right now!
You are not being watched by the government or your phone, but perhaps by something in another dimension. Imagine a reality where we are absolutely flat and we also live in a completely flat universe. Basically, we and everything around us is flat. We are two-dimensional.
If that were the case we would know about moving left and right and moving forward and back, but we would never have heard of moving up or down.
Now imagine that one day a three-dimensional person went into our two-dimensional world. He came into your flat 2D house and said hello, you would be able to hear him, but you wouldn’t be able to see him, because you can’t see the third dimension. You might be able to barely see the two-dimensional characteristics of the 3D person, but that’s beside the point. The point is… If there is a fourth dimension, we might not be able to see it.
Credits: Gabesweats and Carl Sherman
