Verse 18 shifts the focus to the tangible results of yoga-siddhi, delineating the fundamental obstacles overcome by the practitioner. The declaration that the yogī becomes “free from all disease, exempt from old age and death” is a powerful assertion of the transformative potential of yoga. The triad of vyādhi (disease), jarā (old age), and maraṇa (death) represents the inherent suffering—the dukha—that characterizes existence within the cycle of prakṛti. The text’s assurance of their transcendence isn’t simply a claim of longevity or immunity; it signifies liberation from the limitations of the physical body and the illusion of a separate self. For a haṭha yogī, this realization is inextricably linked to the awakening of kuṇḍalinī, whose activation dramatically alters the flow of prāṇa and initiates a process of rejuvenation, effectively delaying the effects of jarā. Importantly, the promise of “always attaining liberation” (muktiṁ lभेत् सदा) suggests a permanent state of freedom, a condition achieved not through external ritual, but through the inner transformation facilitated by consistent dhyāna and samādhi.