(i.) — _The manifestation in the heart._ — A detailed knowledge of this manifestation is called Dahara Vidyâ in Chandogya. The Upanishads speaks of Âtmâ in the cavity of the heart. "Guhahitam Gahvarestham Purânam" is a well-known passage from the Upanishads. The Purusha in the heart is also called Prâdesâ or the span-sized Purusha and is the favourite object of meditation in Paurânika Upâsanâ. The Upanishads call Him thumb-sized and there is an interesting discussion as to the size in Sâriraka Sutras I-3-24 to 26 and the Bhâshya thereupon. (ii.) — _The Manifestation in the Prânas._ — The Upanishads say: — "It is this Prana that is consciousness itself, Bliss, without infirmities and death." "They are these five Brahmâ Purushas." Again — _"Brahmâ Purusha in the openings of the heart."_ The heart is called the abode of Brahmâ. There are five openings of this abode of Brahmâ and there are five gate-keepers. These gate-keepers or _dvâra-pâlas_ are the five Prânas. They are called Brahmâ Purushas as they pertain to Brahmâ. As long as the king is in the heart, the doorkeepers remain in the body. These door-keepers being inevitable accompaniments of Brahmâ in the heart, are also themselves the outer aspects of Brahmâ. (iii.) — _The manifestation as Âtmâ which is triune._ What is a man but a bundle of experiences on the planes of Jâgrat, Svapna and Sushupti. Each of these experiences has a threefold aspect or in Vedântic expression is a Triputi. These aspects are: 1) the object experienced or Adhibhûta, 2) the experience itself or Adhyâtma, 3) and the Deva which gives the consciousness of that experience or Adhidaiva. In material expression, the object outside is Adhibhûta. The reception of its image is Adhyâtma. The light that shews the image to be what it is, is Adhidaiva. As we have said, each experience is a three-sided triangle. All the triangles in the Jagrat state, analysed by the Vedântins into fourteen, are represented by the first letter _a_ in Pranava. All the triangles or Triputis in the dream state are represented by the second letter _u_. In Târaka Brahmâ Yoga, _a_ is merged in contemplation into _u_, and _u_ is merged into _ma_. In _ma_ there is only one triangle, which is the primary triangle to which all other triangles in _a_ and _u_ may be reduced. The Adhibhûta side of this triangle is _ânanda_ by the _vritti_ of Avidyâ. The Adhyâtma side is the _vritti_ of Avidyâ. The Adhidaiva side is Íshvara. Life in Trilokî is conditioned by this triangle. The object of Târaka Brahmâ Yoga is to cross the Triptiti, to cross the three letters of Pranava. It is only in the fourth _pâda_ of Pranava that he finds his resting place, that pâda being situated beyond the Trilokî.