The most celebrated Yantra in India is the Sri Yantra, the Yantra of Tripura Sundari. It is a symbol of the entire cosmos that serves to remind the practitioner of the non-difference between subject and object.

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.