Chinese esoteric Buddhist practice was depending on deity yoga plus the "3 mysteries": mantra, mudra and mandala. These 3 mysteries allow the Buddhist yogi to faucet into your body, speech and mind from the Buddhas.[one hundred] Nirguna mantras, derived from historical Vedic texts, are older than any of your 3 https://www.youtube.com/@AacharyaGoldieMadan/