Yantra literally means "instrument". A Yantra is a geometric design acting as a highly efficient tool for contemplation, concentration and meditation. Yantras carry spiritual significance, and point the user to higher levels of consciousness. The Yantra provides a focal point that is a window into the absolute. When the mind is concentrated on a single, simple object (in this case a Yantra), the mental chatter ceases. Eventually, the object is dropped when the mind can remain empty and silent without help. In the most advanced phases, it is possible to attain union with God by the geometric visualization of a Yantra. The Yantra is like a microcosmic picture of the macrocosm. It is a focusing point and an outer and inner doorway. The Yantras are often focused on a specific deity and so by tuning into the different Yantras you can tap into certain deities or creative force centers in the universe. Yantras are usually designed so that the eye is carried into the center, and very often they are symmetrical. They can be drawn on paper, wood, metal, or earth, or they can be three-dimensional.
The Yantric Contour
Every Yantra is delimited from the exterior by a line or a group of lines forming its perimeter. These marginal lines have the function to maintain, contain and prevent the loss of the magical forces represented by the core structure of the Yantra, usually the central dot. They also have the function to increase its magical and subtle force.
The Tiangle (trikona)
The triangle (trikona) is the symbol of Shakti, the feminine energy or aspect of Creation. The triangle pointing down represents the yoni, the feminine sexual organ and the symbol of the supreme source of the Universe, and when the triangle is pointing upwards it signifies intense spiritual aspiration, the sublimation of one's nature into the most subtle planes and the element of fire (Agni Tattva). The fire is always oriented upwards, thus the correlation with the upward triangle - Shiva kona. On the other hand, the downward pointing triangle signifies the element of water which always tends to flown and occupy the lowest possible position. This triangle is known as Shakti kona.
The Six Points Star (shatkona)
A typical combination often found in the graphical structure of a Yantra is the superposition of two triangles, one pointing upwards and the other downwards, forming a star with six points (shatkona), also known as David's Star. This form symbolically represents the union of Purusha and Prakriti or Shiva-Shakti, without which there could be no Creation.
The Lotus (padma)
The lotus symbol (or its petals) is both a symbol of purity and variety, every lotus petal representing a distinct aspect. The inclusion of a lotus in a Yantra represents freedom from multiple interference with the exterior (purity) and expresses the absolute force of the Supreme Self.
Instructions for Yantra Meditation: