The third eye is a non-material sensory "organ" that can perceive the astral world. In most humans, this third eye is closed and needs practice and spiritual development for opening and cleansing its pathways, to allow perception. It is linked with the chakra system. Through this link it is possible to perceive higher vibrations, like those from the higher bodies and other astral beings. The degree of how much the third eye is opened is not necessarily a sign for the spiritual level of a human being.