How to see the soul around you? Including the hungry ghost and the devil you mentioned, all belong to this category, that is, look at some invisible creatures around you! The human eye is limited and can only see light (called "visible light") with a wavelength of about 400 nanometers (purple light) to 700 nanometers (red light). If some creatures are not in this band, we can't see them. This is the soul. Generally, only a few possibilities can be seen:
1, instrument measurement. Generally speaking, the electromagnetic field is unstable. When Mr. Feng Shui measures Feng Shui, he will be very vigilant when the pointer moves.
2. Natural eyes can see. Commonly known as "yin and yang eyes" or "ghost eyes", you can see. There is also a more advanced "eye of heaven" than the eye of yin and yang. Yin He's eyes can be seen directly, while the celestial eye is under the eyebrows, so you have to close your eyes to open them.
3. The eye of heaven or the eye of yin and yang is temporarily opened. Sometimes the master urges you, so you can hold a meeting temporarily, depending on the skill of the master.
4. Cultivate the eye of the sky. It's easy to see things around.
5. sensitive. People with keen perception can find it by feeling.