The ajna chakra is highest of the psychic centres in man. Above this level are bindu and sahasrara, which are not chakras or psychic centres - they really come into the realm of the ineffable. In the human framework there are said to be ten doors of perception. The first nine are the two eyes, two ears, two nostrils, mouth, anus and sexual organ. These are the gateways through which a person communicates with the outside world. The tenth door is ajna chakra, which leads 'upwards'. It is the tenth sense that leads directly to sahasrara, the source of all things. The first nine doors lead out to the material realms of being; the tenth door, ajna chakra, leads into the more subtle realms. It is the gateway to the fountainhead of life.