ब्रह्मचर्यरतस्यैव नित्यं हितमिताशिनः । मण्डलाद्दृश्यते सिद्धिः कुण्डल्यभ्यासयोगिनः ॥ ३.१२१ ॥

brahmacaryaratasyaiva nityaṃ hitamitāśinaḥ । maṇḍalāddṛśyate siddhiḥ kuṇḍalyabhyāsayoginaḥ ॥ 3.121 ॥

Only one who delights in the life of abstinence (brahmacharin), who always conforms to a moderate and salutary diet, and who practices yoga by stimulating Kundalini will approach Siddhi within forty days.