The Mantra of Purifying the Mouth is recited to sanctify the organs of speech and consumption before ritual practice. In Taoist cosmology, the mouth can harbor impure energies from daily speech and food. This mantra invokes the five spirits (神) residing in the mouth, tongue, teeth, throat, and heart to cleanse residual impurities and transform saliva into a sacred nectar (玉液) that nourishes the internal organs. It ensures that prayers, invocations, and mantras spoken during ceremonies are pure, powerful, and reach the celestial realms uncorrupted. It is an essential preparatory step in all formal Taoist liturgy.