In Hinduism, a linear cosmic symbol used as an aid to spiritual concentration
means "support" & "instrument"
a geometric design
a highly efficient tool for contemplation, concentration and meditation.
Carry spiritual significance
there is a specific meaning that pertains to higher levels of consciousness.
used as a focal point that is a window into the absolute.
When the mind is concentrated on a single, simple object, the mental chatter ceases.
Eventually, the object is dropped when the mind can remain empty and silent without help.
Hindus believe that in the most advanced phases, it is possible to attain union with God by the geometric visualization of a YANTRA.
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.