He who knows for certain the similarity of the three states and the three letters of Om, based upon their common features, is worshipped and adored by all beings and also is a great sage. Meditation on the “soundless” brings no attainment. Om should be known quarter by quarter. There is no doubt that the quarters are the same as the letters. Having understood Om quarter by quarter, one should not think of anything else. The mind should be concentrated on Om. Om is the fearless Brahman. He who is always absorbed in Om knows no fear whatever.