Jagadguru Sri Chandrasekharendra Saraswati Swamigal (20 May 1894 – 8 January 1994), also known as the Sage of Kanchi or Mahaperiyava explains the greatness of Yantra. Lines, circles, squares, figures formed by these – all these configured into a Chakra along with a centre point (madhya-bindu), is called a Yantra. Only such a design has the power to bring into focus the power of the particular devata – in fact it is an infinite power –and so may be called a ‘Divine Design’. These designs collect and absorb divine energy and have the power to radiate that energy. A Yantra means that every bit of it whether a line or a circle or an angle, has to be of the right size and proportion as prescribed. It cannot err even a little this way or that way. Just as a mantra, with a wrong incantation, produces contrary effects, so also a small mistake in the design of the Yantra can cause havoc. In the Shri Yantra again, if the apex of the central triangle faces west instead of