Yantras supplement the power of mantras and are as strong as the mantras themselves. If a mantra is the invisible driving force, the yantra is the visible means to gain power and wealth, ward off evil and illnesses, nullify the ill-effects of planets, bring you luck in love & life, enhance your capabilities - and bless you with almost any material comfort or spiritual benefit you desire.
Yantra means "Loom, "Instrument or Machine". In actual practice a Yantra is a symbolic representation of aspects of divinity, usually the Mother Goddess. It is an interlocking matrix of geometric figures, circles, triangles and floral patterns that form fractal patterns of elegance and beauty. Though drawn in two dimensions, a Yantra is supposed to represent a three dimensional sacred object. Three-dimensional Yantras are now becoming increasingly common. Although the Yantra is primarily a meditation tool both for serious spiritual seekers as well as sculptors in the classical tradition, its Shakti is also available to new seekers with sincere devotion and good intention.
Yantras are also used for innumerable mundane purposes such as to enhance the quality of one's life, attract prosperity, abundance, love, harmony, peace, enhance learning, promote healing, relieve health problems, for career advancement, achieve desired goals in projects, improve business and protection from negative forces. Yantras are often mistakenly thought to be symbols purely of the manifold aspects of the Mother Goddess. This is an understandable error as most Yantras are indeed connected to the Goddess, the most famous being the Sri Yantra, an abstract representation of the Mother (and Father too!) as Cosmos. The Sri Yantra is also commonly misunderstood to represent Lakshmi, the Goddess of Fortune but it is more true to say the Sri Yantra includes and transcends every notion of divinity ever conceived of the pantheons of deities relating to the Sanatana Dharma. However, there are Yantras for male deities such as Lord Ganesha and Lord Kubera but they share a common Yaksha origin with Goddess Lakshmi. The Yakshas were original chthonic deities of India and Yantra systems seem to have been incorporated into the Vedic worldview at a later stage. Within the body of more complex Yantras, monosyllabic mantras, the Beeja or "Seed" mantras are inscribed to constitute the subtle forms of respective Gods and Goddesses.
Most designs often focus attentive detail upon the center of Yantras usually a dot or Bindu which is the Locus Mundi, the center of all things and represents the Unmanifested Potential of all creation. Other figures usually symbolize various stages within the unfolding of creation. Thus, every Yantra is a symbolic representation of both the deity as well as the universe. The Mother Goddess not only permeates the substance of the universe, but is literally the Universe itself. Abstract geometric representations of the universe that do not represent a deity, are called Mandalas. Every Yantra is a also a Mandala, though not all Mandalas are Yantras. In ancient texts, Lord Shiva is supposed to have explained the mystical meaning of the Yantra to his consort, Goddess Parvati: "The Yantra is as essential to a god as oil is to the oil lamp or as a body is to a living human being". Yantras are constructed with observing immutable laws of sacred geometry, being symbolic representations of energy patterns of a deity and rank amongst the most powerful 'centering' devices for harnessing divine energies. The Yantra is actually more powerful than a picture of a God which, to be energized, requires a Yantra to be affixed at its base or back. A Yantra always contains a Mantra associated with it.
Just as the mind is a part of, yet different from the body, so is the Mantra from the Yantra. The Mantra is the mind consciousness while the Yantra is the form of the deity. Most of the time question asked how soon can one expect to experience the benefits of wearing or installing a Yantra. This usually takes 45 days but this is a conservative estimate. Some Yantras activate results almost immediately if one's karmic potential is ripe. Others work better over the long term, gradually but steadfastly increasing stages of blessings. Yantras for prosperity and wealth are usually of this category. Hence patience is required. For example, the Lord Kuber Yantra may or may not bestow immediate results but the patient person will eventually see benefits. It is known that the greatest bounties that can be conferred by the Lord Kuber Yantra come after 3 years in many cases. Yantras for health, preventing accidents and mishaps and the like, are known to be working if nothing is going wrong! However, despite one's best intentions, the desired results may not always be achieved. This is usually due to reasons of karma that have to be worked out and experienced before the organism can achieve its desire.