SĀDHAKA (masc.) or SĀDHIKĀ (fem.; “accomplisher”), the Tantric designation for the spiritual practitioner (yogin or yoginī). According to the Shiva-Samhitā (5.10), there are four types of practitioner, depending on their enthusiasm and commitment to the spiritual process: (1) The mridu-sādhaka (“soft practitioner”) lacks zeal, is dull-witted, sickly, greedy, attached to his wife, fickle, timid, ill, cruel, dependent on others, and given to evil deliberations; he finds fault with his *teacher and is a miracle monger (bahu-āshin, written bahvāshin) . Such an individual is said to be fit for *Mantra-Yoga and may succeed after twelve years of diligent application. (2) The madhya-sādhaka (“middling practitioner”) is even-minded, patient, desirous of virtue, soft spoken, and moderate in all undertakings. He is suited for LayaYoga. (3) The adhimātra-sādhaka (ardent practitioner”) is fit for Hatha-Yoga and may obtain success after six years of practice. He is steady-minded, disciplined, self-reliant, energetic, compassionate, patient, honest, courageous, mature, and filled with faith; he also has high expectations, worships his teacher’s *feet, and is constantly engaged in Yoga practices. (4) The adhimātratama-sādhaka ( “most ardent practitioner”), who qualifies for any type of Yoga and meets with success after only three years of practice, is highly energetic, zealous, agreeable, valiant, informed about the teachings (shastra), eager to practice, not deluded, not confused, in the prime of his youth, moderate in his diet, with his senses under control, fearless, clean, skillful, charitable, a support to all people, competent, firm, wise, content with his lot, forbearing, good natured, virtuous, well-spoken, and free from major illnesses; he can also keep his endeavors secret, has faith in the teachings, worships his teacher and the deities, avoids public gatherings, and practices all forms of Yoga.