The Septuples are formed by a, u, o, m, _Vindu_, _náda_ and _Sánta_ or ultimate silence, and these are used to symbolise the pantheistic form of the god Viráj, in the following description of him given by Sankara. [Sidenote: 2. The 7 Parts of Viráj Body.] “His head—the heavens; his eye—the sun; his breath—the wind; his center—the ether; his urine—the water; his feet—the earth; his mouth the fire.” Anquetil gives the five senses, the mind and intellect as his seven members. (Weber’s Indian Studien. Vol. II. p. 107). [Sidenote: 3. The Other Heptads.] According to other accounts there is a sevenfold septuples included in the figure Om comprising the Universe. The first _trisaptaka_ or triplex septuple comprises the seven spheres of heaven, the seven pátálas or infernal regions, and the seven _Bhuvanas_ of earth. The second _trisapta_ consists of the _sapta dwípas_ or seven continents of the earth, the seven oceans, and the seven planets; and lastly the _sapta swara_ or the seven notes emitted by the planetary motions. [Sidenote: The Octads or octuples.] The octuples consist of the aforesaid seven parts and the _sákti_ or word _namo_ added to them at the end, and are used as symbols of Viráj for the five vital airs, or the five organs of action and those of intellect _i. e._ the mind, intellect and self consciousness or _chítta_. [Sidenote: The Nonads.] These are nine cavities of the body नबद्वारगृह the abode of Brahma. [Sidenote: The _Decads_.] These are the ten internal and external organs (पञ्चकर्म्मेन्द्रिय and पञ्चबुद्धीन्द्रिय) of the body—the seats of Brahma. XIV. PHILOSOPHY OF THE NUMERICAL GROUPS CONTAINED UNDER THE MYSTIC SYLLABLE OM. [Sidenote: 1. Inquiry into the numerical groups.] After the lengthy account we have given of the various classes of words contained under the different numbers and divisions and subdivisions of the mysterious letter _Om_, it must be asked by the inquisitive reader, what do these clusters of concrete and abstract terms which are numerically jumbled together under the unintelligible character _Om_ serve to mean, and of what use are they to the contemplative Yogi in his meditation on the attributes of his Maker by that symbol? [Sidenote: 2 (_a_). Enlargement of the understanding.] In answer to this query we are bound to repeat the definition of yoga, that it is the process of joining the ideas in the mind, and practicing the limited powers of the understanding to rise by degrees from their grasping the ideas of unities or single objects at a time, to the comprehension of dualities and pluralities for the enlargement of the intellect, till at last the mind is fraught with a clear and distinct idea of every thing in the universe comprised under the several groups or generalizations of particulars. [Sidenote: 2 (_b_). Their Pantheistic view.]