The word bindu comes from the Sanskrit root bind-‘to split’, ‘to divide’. In Sanskrit text it is often called chidghana, that which has its root in the limitless consciousness. The seat of bindu is at the top back of the head. Ajna chakra is the subtlest of all chakras. Beyond ajna and even more subtle is bindu. Bindu is not a chakra. The chakras are associated with the human psychic framework. Bindu on the other hand, is the subtle centre from which the human framework itself arises. Bindu is therefore the primary manifesting source of the chakras themselves. The chakras are within the realms of the mind, while the bindu is beyond the mind. This means that the bindu is the origin of individuality. It is the place where the oneness first divide itself to produce duality, the world of multiple forms. Bindu implies a point without dimension- a dimensionless centre The word bindu also mean zero or voidness. It is the voidness that contain the fullest potential. It is from this point an organism can evolve or grow. Bindu contains a blueprint of all the characteristics of the object to be evolved. The nature of the evolved object is fixed by the blueprint of the bindu. The bindu is both the means of expression of consciousness and also the means of limitations. The faculty to be conscious or unconcious depends only on the nature of the apparatus of the individual object, this is determined by the bindu. Man has the apparatus that allows him to be a conscious centre. Every object evolves into material existence through the medium of the bindu. Bindu is related to concentration of the mind where it is responsible for dissolution or nullification of mental fluctuations.
Bindu is represented by the crescent moon and a white drop, which is the nectar dripping down to vishuddhi chakra. It is the ultimate source out of which all things manifest and into which all things return. The crescent moon indicates that bindu is closely related to the phases of the moon. The immensity of sahasrara is gradually unveiled through ardent yoga practice in the same way that the full moon is progressively revealed from the time of the new moon to full moon each month. The background of the night sky also symbolizes the infinity of sahasrara beyond bindu. Bindu belongs to the seventh or the highest loka of satyam, the plane of truth, and it also belongs to the casual body.