celibacy prevents the loss of vitality, and thus vīrya, potency, is retained. This accumulates until it culminates in physical and spiritual power… Brahmacarya, celibacy, then, enhances potency.
Drawing on Ayurvedic physiology, this passage presents celibacy as the conservation of ojas and vīrya, arguing that sexual continence directly produces both physical vigour and mystical capability.
, The Yoga Sutras of Patanjali: A New Edition, Translation, and Commentary, 2009thesis