I have come to realize that for this sadhana of the body, a mantra is essential. Sri Aurobindo gave none. He said one should be able to do all the work without resorting to external means. Though had he reached the point where we are now, he would have found that the purely psychological method is inadequate and that a mantra is necessary, because only a mantra has a direct action on the body. Of all the formulas or mantras, the one that has the most direct effect on this body is the Sanskrit mantra:
OM NAMO BHAGAVATEH
The first word, OM , represents
the supreme invocation, the invocation to the Supreme.
The second word, NAMO, represents
total self-giving, perfect surrender.
The third word, BHAGAVATEH, represents
what the manifestation must become — Divine.
When I sit in meditation or I have a minute of quiet for concentration, this mantra arises from the solar plexus, and there is a response in the cells of the body: they all start vibrating. Everything gets filled with Light!