Really? I would be interested if someone can demonstrate this.
Here is a extract from the Union of Sun and the Moon Tantra;
"1) As a beginner, using the bee-like conduct of integrating numerous Dharma teachings, you should attain certainty as to learning, reflection and meditation.
2) With the conduct of a swallow entering its nest, you should cut through misconceptions about the oral instructions and ensure that the deviations of doubt, obstacles and faults do not occur.3) Following this, during the actual practice, you should have the conduct of a wounded deer and keep to unpeopled mountain dwellings free from the ties of worldly distractions.
4) As an aid to this you should keep silence, having the conduct of a mute. For your entire life refrain from engaging in flattery or slander.
5) Keeping the conduct like a madman, cast away prejudice and attachment, like, dislike and indifference toward friends and enemies.
6) Adopting the conduct of pigs and dogs, you should be content with whatever happens and take whatever is experienced as your companion, without pure and impure concepts concerning food, clothing, dwelling and sitting place.
7) Through the lion-like conduct of the king of beasts, you should be free from anxiety about events and completely cast away all fetters of hope and fear. Until you have realized the fruition, practice so that you can endure heat and cold and good and bad equally, without falling under the power of circumstances."
"The direct, hard to understand, subtle field of knowing, the Great Path, is non-conceptual (akalpana), and entirely beyond the grasp of intellectual thought. Divorced from verbal ideation, it is difficult to point out and as difficult to enquire into. It cannot be communicated through words and [therefore] is not within the scope of the neophyte (adikarmika). Nevertheless the path is to be approached through studying scriptures (sutra) of the World-Teacher and following the personal instructions (upadesa) of one's Guru-ji."
Bodhicittabhavana by Acarya Sri Manjusrimitra