When one contemplates the Self serene, without disturbance, without differentiating thoughts, equal before all perceived differences — then all faculties become quiet. The wise recognize in that knower of the field the path toward immortality.

This verse describes the state of nirvikalpa-samādhi: the stilled mind beyond all differentiation (vikalpa). When the tendency to divide experience into “this and that” ceases, the faculties (kalāḥ) become silent and what remains is the kṣetrajña — the witness of the field of experience. This is the direct recognition of the Ātman as the very nature of consciousness, identical to what the traditions of yoga call amṛtatva: immortality not as eternal life of the body, but as realization of what was never born.