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Obviously, it's not really the "body" that is wiser, it is the non-conceptual mind which constitutes the underwater part of the iceberg the top of which we see as our conceptual mind. The question is, should we trust it?
Generally speaking, in western culture the body with its instincts and emotions is seen as an animal - stupid and violent, while the rational mind is seen as all that is good in the human. However, other cultures may have different basic assumptions. At the risk of overgeneralizing, I think that in Asian cultures the ancient heart-mind (the deep emotional mind - what we westerners usually call "the subconscious") - is generally recognized as a source of wisdom, harmony, and the arts - while the modern rational mind is often seen with suspicion as the source of confusion and conflict.
As for canonical evidence, all we have are some bread-crumble trails that look cohesive enough to some but not convincing to others, as is often the case with Buddhism:
Buddha of Pali Canon spoke about "mindfulness of body" (kayagata-sati) and "the signless" (animitta). The contemporary Mahayana tradition holds that these are references to tapping into the non-conceptual mind, which is experienced as (psychosomatic) sensations in the body.
Personally, I was given a significant amount of training and instruction on getting in touch with the above through various psychosomatic practices, and in my experience it all comes together quite cohesively and makes total sense. To me these practices were presented as integral part of the teaching and I certainly see them as important as meditation and study of texts, if not more important.
As for the textual sources, the closest I can think of is Touching Enlightenment: Finding Realization in the Body by Reginald A. Ray (a student of Chogyam Trungpa Rinpoche and a Ph.D). There is also a 100% western work called Focusing, developed by a psychologist Eugene Gendlin in 1970s, which speaks about same thing from a slightly different angle (thanks to Ronald Cowen for pointing out the Focusing book to me). If you are interested in emotional intelligence and psychosomatic methods, whether Buddhist or not, these two books are recommended.
Now, to address your specific concern: you are right that in an untrained person the signals from the non-conceptual mind can come mixed up with all kinds of phobias and prejudices, so a lot of preliminary work is required to clean that up until it can be fully trusted. That said, I do believe that the more someone is "enlightened" the more he or she can utilize the non-conceptual mind to its full capacity, which exceeds that of conceptual mind.
Upvote:1
Maybe I just don't understand your question at all.
The body doesn't know anything. The mind is the forerunner of all things (Dhammapada). And strictly speaking, the body doesn't exist at all. It's just a compilation of different phenomena (earth, water, fire, wind etc) that can be known and changed. Rupa (matter) doesn't know, nama (mind) does. Tension (wind element), what would that signal? Maybe some alert state, well, that's mind again.
So, I would be very surprised if someone could come up with a sutta which shows that the body is always right. (I mark this question as favourite to not loose site of it, cause it's intriguing.) What does it even mean?
Can the mind lie or be wrong. Definitely. All mind states with avija/ignorance are. But there are also lot's of mind states with wisdom. Think of the jhana's for instance. How can mind states with wisdom be lying?
My impression is that you are skeptical with good reasons. My advice would be to leave what this teacher said behind you, let it go. If it's only confusion and raising doubts then it's not helpful to you. (Mind you, I'm not saying anything about the teacher, since I don't know him.)
Addition after edit question of OP: If we scratch everything unnecessary then I think the main point of the question is whether giving is good or not. In that case I would suggest that giving dana has a lot of positive things to offer.
There are probably more positive effects of giving in the teachings. And since I'm not a scholar I leave it at that.
I wouldn't make too much of the comments of the teacher. He seems to be parroting. It's not important. Just give if you feel like it. Don't if you don't feel like it. Make it a training, not a 'must'.
Upvote:1
Not knowing more than what you offer in the question it sounds to me like this is a bit of hogwash. I don't know of any Sutra or Buddhist teaching that would answer your question in the affirmative. Rather, I'd say that often our "instincts" often just reflect the habits that we've engendered over countless repetitions. Most of us have very bad habits myself included. All sentient beings have ignorance as a basis for these bad habits.
For instance, humans largely have an unconscious bias for those people who look like them. Project Implicit at Harvard is doing a lot of work to uncover these subconscious habits of mind. Here is a test you can take to uncover your own implicit bias. I think it is far more useful to become familiar with these subconcious habits and evaluate them with your rational mind rather than learning to turn off your rational mind and just following these "gut instincts" without critical reflection.
My two cents to be taken with a grain of salt...