An analysis of a meditation manual titled "Baep Doen That" (Model for walking the elements) attributed to Supreme Patriarch Suk Kai Thuean (1733–1822) of Bangkok, Thailand, describes a practice for advanced meditators. The manual consists of visualizations of the six elements (earth, water, wind, fire, space, and consciousness) plus mind (citta), represented by sacred Pāli syllables in eight verses. Each verse is taken from the Iti Pi So Eight Directions protective chant and is aimed at developing one of the eight supernormal knowledges and powers (vijjās). The analysis incorporates interviews with the current lineage holder of Suk's meditation.
An eighteenth-century manual from Wat Pradusongtham, a late Ayutthaya meditation center, describes protective diagrams called Triple Gem Qualities yantras, which represent the qualities of the Buddha, Dhamma, and Sangha, along with the Ratanamālā protective chant. It also provides instructions for visualizing four Pali syllables—na, ma, a, and u—that stand for four precious gems and the four elements (dhātu) composing the body and physical world. Adepts use these gems to manipulate natural forces, cure illnesses, perform miraculous powers, and activate protective devices.