Śivasaṃhitā 3.75

The pañcadhā dhāraṇā — the fivefold concentration on the five elements — is now presented as the definitive practice completing advanced prāṇāyāma’s work. Asminkāle (at this moment, at this precise time) indicates that dhāraṇā must be practiced in the paricayāvasthā state, not before: it is a practice requiring the stability and permeability that only that stage provides. Attempting it earlier is premature.

Drinking the vital fluid (salilaṃ pibati) «day and night» through the crow’s beak technique describes a practice transcending formal meditation periods to become a continuous state. The advanced yogin does not only practice khecarī mudrā during the seated session: the state of receptivity toward amṛta becomes permanent, as if the glottis of subtle perception remained constantly open.

The acquisition of dūraśruti (distant hearing, clairaudience) and dūradṛṣṭi (distant vision, clairvoyance) as result of drinking the vital fluid points to the connection between nourishing the subtle nervous system and extending the senses beyond their ordinary physical limits. When amṛta reaches the sensory organs through the suṣumnā channel, these acquire a sensitivity not limited by physical instruments.