The Four Qualities Necessary for Samadhi
Sutra 20 of Book One of the Yoga Sutras of Patanjali 20. [In the case] of others [upaya-pratyaya yogis] it is preceded by faith [shraddha], energy [virya], memory [smriti] and high intelligence [samadhi-prajña] necessary for Samadhi. Upaya-pratyaya yogis are those that have followed the traditional sequence of yogic practices and disciplines. Their