As far as Dongmi is concerned, it can produce the effect of blessing practitioners through the combination of ten fingers and the idea of psychological imagination, which conforms to certain practice and forms different "handprints" with each other. Tantric theory holds that hands and fingers are externally connected with the Buddha nature of Buddhism and internally connected with internal organs. Therefore, when practicing Buddhism, the formation of "handprints" can inspire each other with the body secrets of buddhas and bodhisattvas that have been achieved in Buddhism, and increase the quick effect, just like gaining the divine power of the Buddha itself.
Besides handprints, there are all kinds of sitting postures, which are as diverse and meaningful as handprints. In full meditation, "auspicious sitting" and "magic sitting" are two kinds that ninjas often practice. Ninja usually needs to cooperate with the "incense" in the Five Classics of Ninja (detailed in later chapters) to practice the spirit of auspicious sitting and devil sitting.
Secret language, also known as mantras, is to create something in the mind of the practitioner by reciting a string of mantras and urge it to change. This special note is used to vibrate the qi pulse in the body, and the idea is concentrated on one point, forming extraordinary potential and inspiring magical power and high wisdom. The number of mantras of tantric schools is as varied as handprints, such as: Fire Naive Mantra, Devil of Hell Mantra, Four Heavenly Kings Mantra, Golden Winged Bird Mantra, Luo Cha Mantra, Luo Cha Mantra, Blessing Mantra, Samadha Mantra, Immortality Mantra, King Kong Armor Mantra, etc. And there are five-character spells, hidden six-character spells and manjusri spells.
Ninja's mantra of "facing, fighting, fighting, being, being, array, pillar, being and being ahead" is the mantra of Datura of the Ninth East Secret Society. Tomi incantations are mainly pronounced according to the combination of sounds and rhythms of ancient Indian Sanskrit letters. However, the incantations handed down from Tomi Avenue in Kameyama, Japan, have generally become Sanskrit with Japanese pronunciation. It is a very complicated problem to study the phonology of tantric spells in detail now. However, unlike the six-character mantra of Tibetan secrets, which originated from ancient Indian Sanskrit, the nine characters of "pro, soldier, dou, zhe, Jing, truth, fierce, zai and Qian" originated from the Taoist classic "Bao Puzi" in the Eastern Jin Dynasty in China. Everyone knows that Bao Puzi is a Taoist classic, which is divided into two parts: inside and outside. The inner part mainly introduces Taoist alchemy, forbidden art and health preservation, while the outer part is related to military strategy and political theory. The nine-character mantra comes from "Bao Puzi, Inner Chapter, Deng She".
The secret of meaning is the most important part of the "Three Secret Blessings". In the whole process of practicing the secret method, both body secret and language secret can play a role according to meaning secret. The secret of meaning leads to the potential of consciousness through "visualization" and reaches the realm of transcendence. As mentioned earlier, the nine-character mantra of Ninjutsu is a kind of self-hypnosis secret, just like a magician hypnotizes an assistant in a modern magic show and says, "You are a stick", even if someone stands on the assistant's suspended body, he doesn't know it. One meter uses the process of sticking fingerprints and praising the truth to concentrate and paralyze yourself. He made the ninja excited, made him forget the pain in the battle for a while, and completely turned into a killing machine running at full capacity.