It is vows or asceticism or incantations or drug in your season or the efficacy of science or the influence of youthful appearance or the recitation of particular formulae or homa or collyrium and other medicament?
व्रतचर्या तपो वापि स्नानमन्त्रौषधानि वा। विद्यावीर्यं मूलवीर्यं जपहोमागदास्तथा॥