Yantra is the use of various
energy patterns, or geometrical designs. The Yantra is the
energy form of the mantra. It is the subtle form of the
deity. Yantras are used not only for visualization and
meditation, but also used for good luck, like talismans.
They help us redirect our psychic energy in a creative and
transformative manner. Many astrologers prescribe them and
they are as useful, though less expensive than gems, for
warding off negative planetary influences.
Most important is the Shri
Yantra, the main yantra to the Goddess. Other important
yantras are Ganesh Yantra for giving good fortune and
warding off obstacles, Mahamrityunjaya Yantra for warding
off death and difficulties. Special Yantras exist for each
of the planets.
Mandalas are extended yantras.
Around various yantras additional forms, usually of Gods and
Goddesses, are added. Mandalas are also mainly for
meditation and are prominent in the Buddhist tradition.