Your mind can be decieved but not your eyes. They are lazer sharp and exact. Your mind's interpretation of visual information makes you see whatever your mind thinks it saw. It's own interpretation of what's happening. The actual reality may differ a little or alot from what you are "being told" you are seing by your mind.
The best vision technique is out of the corner of your eye. The mind can't interpret at that wide of an angle and so what you see is actual reality. If something went zooming by...then it actually happened. Your eyes caught it. Beings co-exist with us but travel at much higher speeds so we don't see them. Sometimes we catch glimpes. Most people call them ghosts, I call them just ordinary people living their lives in another higher dimension. Our dimension overlaps theirs, interconnected, yet physically seperated. Neither one is aware of the other, yet share the same space.