Can Vajrayana tummo practice really generate body heat? Can deity practice actually heal? Are Deities real? If they are real, why do we have to visualize them? Why do we imagine deities at all? What is the process that allows our imagination to connect with the true nature of the Enlightened Deity? What are the benefits of visualizing deities — as compared to simply meditating, praying or chanting mantras. In this Buddha Weekly feature, we try to explore some of these questions.
Healing power of visualization
In a different demonstration of the transformative power of Vajrayana meditation, various peer-reviewed clinical trials have shown that meditation practices, such as visualization, have specific healing properties. (Full story here>> ) In particular, Vajrayana deity visualizations have been shown to improve cognitive abilities and help with the treatment in Alzheimers. (Full story here>>)
Is this the real healing energy of Medicine Buddha, or our own mind triggered by the visualization? Or both? We could say it is both — and ultimately — it doesn’t matter.
Tummo demonstrates visualization power
One of the most intriguing demonstrations of the power of Vajrayana visualization is Tummo. By visualizing heat in the tummo center, an expert practitioner can actually meditate for hours on an icy winter day — without clothing or discomfort. The meditation requires teacher-guidance, and years of practice. Essentially, we visualize heat being generated around our navel chakra, through a complex visualization. By investing deeply in the visualization — by focusing on feeling heat in one point in our body, our mind — after training and practice — can appear to generate actual heat, sufficient to ward off an icy winter’s day. (Not recommended for beginners! This is an advanced completion practice.)
Although most of us are not capable of this advanced completion practice, it demonstrates the power of the mind over the body — and the power of imagination over mind. The method used to “trigger the mind” is visualization of the inner body.
Imagine deities — what’s that about?
Aside from healing, or generating body heat, what is the real purpose of visualizing deities in advanced Vajrayana practice? Why does Vajrayana visualization almost always imagine deity images? And, why are there so many deities in Vajrayana Buddhism — some of whom are so ferocious they would send demons running for cover? Are these real beings or symbolic? If the ultimate realization of “reality” is Emptiness, why visualize forms at all? What makes Vajrayana so effective in transforming the mind?
Deities in Many Forms — More Than Just Symbols
A thousand arms of caring — instantly a Mahayana Buddhist thinks of Avalokiteshvara. A loving mother, who would sacrifice all for the safety of her children — brings to mind Tara, with her one leg poised to spring into action. The pure white light of purity and cleansing — immediately invokes images of Vajrasattva. Then, there are the ferocious faces of Enlightenment, most recognizable in the terrifying fanged-face of Mahakala — who is none other than Avalokiteshvara in his wrathful form.
These are much more than archetypes. Yes, they are visual language, but they also trigger a “connection” in our mind to the Buddha.
Those who only see the outer form, might jump to the conclusion that Vajrayana Buddhists are superstitious. In fact, Vajrayana practices are powerful for helping us overcome “our self centered thoughts and habitual storylines.”  In other words, potentially, visualization engages the mind fully in change. Either change in the form of healing, or change in the form of perception — which is a key purpose of deity practice.
The Power of Visualization to Heal
Caregivers for many chronic illnesses know the power of visualization meditation. A patient with cancer might be provided with guided visualization meditations — visualizing the cells of their own body attacking and destroying the cancerous cells.
Famously, David Seidler, who won an oscar in 2011 for his screenplay “The King’s Speech”, a play about King George VI who had cancer, recovered from his own cancer through the power of “imagination.” As reported in CNN Health: “Seidler, 73, suffered from cancer, just like the king did. But unlike his majesty, Seidler survived the cancer, and he says he did so because he used the same vivid imagination he employed to write his award-winning script. Seidler says he visualized his cancer away.” 
“The mind has the power to heal,” explains Christiane Northrup, a best selling author. The mind also has the power to overcome pain and create the conditions for success. Explains Dr. Bernie Siegel, author of Love, Medicine and Mircles: “When an athlete visualizes success, their body really is experiencing success. When you imagine something, your body really feels like it’s happening.”
Likewise, Vajrayana practitioners, who practice Tummo, can be seen comfortably meditating outdoors without clothes in the winter — using the power of mind to control body heat. For centuries, Vajrayana practitioners have understood the power of visualization, not just to heal, but to transform our own minds.
A modern-day demonstration of Tummo. In real-time, this practitioner seems comfortable with no clothes in winter for the 20 minute video:
Symbols — the Language of the Mind
Teacher Stephen Batchelor explains: “In contrast to the approaches of conventional religion, Tantra does not attempt to soothe the turmoil of existence with consoling promises of heaven or salvation. The Trantric practitioner chooses to confront the bewildering and chaotic forces of fear, aggression, desire and pride, and to work with them in such a way that they are channeled into creative expression, loving relationships, and wisely engaged forms of life.” 
Rob Preece, author of The Psychology of Buddhist Tantra lecture:
By definition, “when we enter the world of Tantra, we may need to loosen some of our preconceptions about the nature of reality,” wrote Rob Preece, in The Psychology of Buddhist Tantra. “We begin to inhabit a twilight world where the distinctions between the material and symbolic are less defined…” 
Stephen Batchelor puts it this way: “Tantra evokes a sense of the dark, esoteric underbelly of Eastern religion … mysterious rituals undertaken at night by initiates, terrifying gods and goddesses, as well as breathtakingly beautiful mandalas and deeply moving chants intoned by brocade-draped Tibetan monks to the syncopated rhythms of bells and drums.” 
Esoteric or Clearly Articulated Practice?
Often we see Vajrayana characterized as esoteric and mysterious. Or superstition — among those who don’t follow the profound logic of visualized meditation. On one hand, there is nothing hidden or mysterious about a meditation method that clearly articulates its methods in precise and detailed sadhanas. The mystery is not as much in the method, as in the ultimate goal of that method. On the other, most of the instructions for practice are passed on from teacher to student through initiation and teaching — making it less accessible, and therefore esoteric, from that point of view. This isn’t designed to keep it mysterious, but to protect the student from jumping to wrong views.
Profound Goal of Vajrayana: Eliminate the Grasping of “Self”
One of the profound goals of Vajrayana visualization is to break down our mind’s stubborn clinging to the notion of “self and other.” By visualizing mind-realms as Pure Lands, apparently as real as our own “perceived” world, we gradually let go the grasping at our incorrect notions of reality. From the point of view of “I” and “other” even a visualized deity has reality. In fact, during “generation stage” visualization practices, the Vajrayana student repeatedly transforms him/herself into the deity, complete with “divine pride.” Then, we demolish that notion, by dissolving our new deity-body to Emptiness. Then, we rebuild the visualization of self as Deity once more. Over and over again.
Then, are we saying the deities are not real, but a skillful method designed to overcome the mind’s stubborn habits of incorrect perception? That they are no more than imagination? Or psychological archetypes. The answer is emphatically no. Deities are real. Full stop. They aren’t flesh and blood, real. They don’t manifest in front of us as a Blue Buddha or a Green Mother Tara. Those understandings are in the realm of our imagination. But our imagination is connecting us to a the Enlightened Deity.
Deity as “Real”?
“When we refer to the wisdom deities as symbolic, we don’t mean they are mere symbols,” explained Eric Holm in his article, “You are Avalokiteshvara.”  So, does that mean the Deity is real, or not real? Depending on your stage of practice, we might realize that the deity we are visualizing is just as real as we are — which is to say we are both ultimately Empty. Empty does not equate to nothingness, and is a profound concept that takes lifetimes to really comprehend (beyond simple intellectual understanding).
So, on one hand Tara is just as real as we are, ready to jump to our aid, an emanation of our mind ready to help us. On the other, at the ultimate level She is no more real than we are. She manifests an image and ego to relate to us. Once we develop realizations of Emptiness, we no longer need Her protection — we understand there can be no fear when we are empty of the clinging to Ego.
BuddhaNature: Deities Help Us See Ourselves
Another way in which we can understand the deity is as a way of expressing our own innate Buddha Nature. Shakyamuni Buddha taught that we all have Buddha Nature, every being without exception. We see it expressed in acts of compassion, and we recognize it in our meditations with glimpses of deeper wisdom. If we can remove the obstacles to practice, such as clinging to ego, anger, impatience, then we can glimpse our Buddha Nature.
The deities help us remove those obstacles. Vajrasattva helps us to visualize ourselves as pure. Tara helps us remove fear, which results from ego-clinging. Avalokiteshvara teaches us compassion. In these ways, they are very real manifestations of our mind, and very potent aid in our practice. Why, then, do these deities manifest in many forms? Because, the language of the mind is image. A thousand arms reaching out to comfort us connotes compassion.
In what ways can deities help us realize our true Buddha Nature? Eric Holm, in a feature in Lion’s Roar, put it this way: “Increased openness to ourselves and to the world comes from letting go again and again of self-centered thoughts and habitual storylines.” 
Even Mindfulness Meditation Works with Images
Even with “mindfulness” practices (common to all forms of Buddhism) we are taught to be the “observer” (not the “listener” or the “reader.”) One reason Vajrayana Buddhism is considered an advanced practice requiring teacher guidance, is — that, besides its level of difficulty — it emphasizes powerful visualization practices of deities and their mandalas. Such intense visualization fully engages all three of body, speech and mind in a process of transformation. Prayer or sutra recitation works primarily with speech. Mudras work mostly with body. Vajrayana practices work with all three.
It may seem contradictory, that in pursuit of Emptiness, we create (visualize) fully populated pure lands. In fact, these visualized mandalas and deities, like mindfulness, help us, at least in part, to overcome the habituation of the mind.
 Stephen Batchelor, in forward to The Psychology of Buddhist Tantra, Rob Preece, Snow Lion Publications
 The Psychology of Buddhist Tantra, Rob Preece, Snow Lion Publications
 You Are Avalokiteshvara, Eric Holm, Jan 1, 2002, Lion’s Roar
 “Can you imagine cancer away?” Elizabeth Cohen, CNN
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