You can see some invisible life forms around you! The human eye is limited and can only see light (called "visible light") between roughly 400nm wavelength (violet light) and 700nm wavelength (red light). If some life forms are not within this band, we cannot see them. Such is the soul. Generally, there are only a few possibilities that can be seen:
1. Instrument measurement. Generally, it shows that the electromagnetic field is unstable. When Feng Shui is measuring Feng Shui, if the pointer moves randomly, he will be very alert.
2. People born with eyes can see. Commonly known as the "yin-yang eye" or "ghost eye", you can see. What's more powerful is the "Celestial Eye", which is more advanced than the Yin and Yang Eyes. The Yin and Yang Eyes can see directly. The Heavenly Eye is under the eyebrows and needs to be closed before opening.
3. The heavenly eye or yin and yang eye is temporarily opened. This can sometimes be activated temporarily by the master for a period of time, and the length of time depends on the depth of the master's skill.
4. Those who cultivate the celestial eye. It's easy to see things around you.
5. Sensitive. People with very keen senses can detect it by feeling.