Tibetan Buddhists believe that saying the mantra (prayer), Om Mani Padme Hum, out loud or silently to oneself, invokes the powerful benevolent attention and blessings of Chenrezig, the embodiment of compassion. Viewing the written form of the mantra is said to have the same effect -- it is often carved into stones, like the one pictured above, and placed where people can see them.
Spinning the written form of the mantra around in a Mani wheel (or prayer wheel) is also believed to give the same benefit as saying the mantra, and Mani wheels, small hand wheels and large wheels with millions of copies of the mantra inside, are found everywhere in the lands influenced by Tibetan Buddhism. The mantra originated in India; as it moved from India into Tibet, the pronunciation changed because some of the sounds in the Indian Sanskrit language were hard for Tibetans to pronounce.
The Meaning of the Mantra
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"There is not a single aspect of the eighty-four thousand sections of the Buddha's teachings which is not contained in Avalokiteshvara's six syllable mantra "Om Mani Padme Hum", and as such the qualities of the "mani" are praised again and again in the Sutras and Tantras.... Whether happy or sad, if we take the "mani" as our refuge, Chenrezig will never forsake us, spontaneous devotion will arise in our minds and the Great Vehicle will effortlessly be realized."
People who learn about the mantra naturally want to know what it means, and often ask for a translation into English or some other Western language. However, Om Mani Padme Hum can not really be translated into a simple phrase or even a few sentences.
All of the Dharma is based on Buddha's discovery that suffering is unnecessary: Like a disease, once we really face the fact that suffering exists, we can look more deeply and discover it's cause; and when we discover that the cause is dependent on certain conditions, we can explore the possibility of removing those conditions.
Buddha taught many very different methods for removing the cause of suffering, methods appropriate for the very different types and conditions and aptitudes of suffering beings. For those who had the capacity to understand it, he taught the most powerful method of all, a method based on the practice of compassion. It is known as the Mahayana, or Great Vehicle, because practicing it benefits all beings, without partiality. It is likened to a vast boat that carries all the beings in the universe across the sea of suffering.
Within the Mahayana the Buddha revealed the possibility of very quickly benefiting all beings, including oneself, by entering directly into the awakened state of mind, or Buddhahood, without delay. Again, there are different ways of accomplishing this, but the most powerful, and at the same time the most accessible, is to link ones own mind with the mind of a Buddha.
In visualization practice we imagine ourselves to be a Buddha, in this case the Buddha of Compassion, Chenrezig. By replacing the thought of yourself as you with the thought of yourself as Chenrezig, you gradually reduce and eventually remove the fixation on your personal self, which expands your loving kindness and compassion, toward yourself and toward others, and your intelligence and wisdom becomes enhanced, allowing you to see clearly what someone really needs and to communicate with them clearly and accurately.
In most religious traditions one prays to the deities of the tradition in the hopes of receiving their blessing, which will benefit one in some way. In the vajrayana Buddhist tradition, however, the blessing and the power and the superlative qualities of the enlightened beings are not considered as coming from an outside source, but are believed to be innate, to be aspects of our own true nature. Chenrezig and his love and compassion are within us.
Chenrezig: The Embodiment of Compassion
In doing the visualization practice we connect with the body and voice and mind of the Buddha by the three aspects of the practice. By our posture and certain gestures we connect with the body, by reciting the words of the liturgy and by repeating the mantra we connect with the voice, and by imagining the visual form of the Buddha we connect with the mind.
Om Mani Padme Hum is the mantra of Chenrezig. In the words of Kalu Rinpoche, "Through mantra, we no longer cling to the reality of the speech and sound encountered in life, but experience it as essentially empty. Then confusion of the speech aspect of our being is transformed into enlightened awareness."
READ MORE AT:http://www.dharma-haven.org/tibetan/meaning-of-om-mani-padme-hung.htm#Meaning