According to ancient Indian philosophy, consciousness expresses itself through nada (subtle vibration). Three concepts are worth mentioning: kala, bindu and nada. Kala is the individuating principle mentioned under the heading ‘Evolutionary Implications’. Bindu is the point through which consciousness expresses itself in the created universe. Nada is the flow of consciousness from the infinite through the bindu to the object of creation. This process can be compared to a funnel: bindu and kala bring the consciousness into a concentrated flow and nada is the medium through which consciousness flows along the restricted orifice. When the nada moves upwards, then creation takes place. This is denoted by the pravritti marga and is called manifestation or material evolution. Nada is regarded as the link between pure consciousness and all created objects. This nada can also be utilized to proceed in the opposite direction – the nivritti marga. That is, nada can be used by aspirants as a means of merging their awareness with the source, the sahasrara, pure consciousness. To bring this about, the nada must first of all pass through bindu on the upward path.
Therefore, nada yoga is a means of retracing the path of nada which was the original means for individual growth and being. With extensive practice, one’s perception becomes more and more refined and sensitive. Eventually, one’s perception of subtle nada becomes so sensitive that one becomes aware of the bindu. This is the gateway to pure consciousness. This is the essence of nada yoga sadhana.
The bindu is symbolized by both a full moon and a crescent moon. The full moon really represents the infinitesimally small point we have tried to describe in the preceding pages. The crescent moon indicates that the bindu is widely associated with the kalas (phases) of the moon. In the same way that the moon is progressively revealed during the period from new moon to full moon, so the immensity of the sahasrara behind the bindu can be gradually unveiled through all types of yoga practices, if they are done regularly and sincerely, and if one has burning aspiration day and night to understand life and oneself. This crescent moon implies that the spiritual aspirant has some glimpses of sahasrara, behind the bindu, but by no means a total experience. The totality can never be known while there is individuality.
The bindu is drawn on the background of the night sky, indicating that the basis of bindu, the sahasrara, is infinite. Most people who practise yoga are familiar with the symbol of Aum: In the top right hand corner of the symbol there is a small point and a crescent moon. The point is called visarga (drop) and represents bindu; the crescent moon also represents bindu, as already explained. The chakras exist in the realm of the main figure, together with the qualities of tamas, rajas and sattwa. These exist in the realm of nature prakriti. The bindu is shown separate from the main body of Aum indicating that bindu is transcendental and beyond the fetters of nature.
Bindu trigger point in kriya yoga
For the purpose of kriya yoga practice, the trigger point for the bindu is regarded as being at the back of the head. The two diagrams for kriyas number 1 and 2 (vipareeta karani mudra and chakra anusandhana) in this lesson show the exact location5.
Practice for location of trigger point
No special practices are required to locate this centre. One should merely begin to practise the first two kriya yoga techniques’. This in itself will lead to sensitivity of the bindu.
Understanding the bindu
The bindu can only be understood through regular practice of yoga, or any other spiritual system. This discussion has tended to be a little technical. If you are the type of person who is reflective in nature and able to unceasingly enquire into the real nature of things, then we suggest that you enquire into the real nature of bindu. If this is done with sufficient intensity, then this alone can bring about an understanding of bindu.