YOGA SUTRAS: Commentary by a Modern Mystic. योगसूत्रचूर्णि:

I would like to go back for a while to the line 1.16 in which Patanjali exposes the factors that accompany the process of comprehension (...

So, developing his idea, in the line 1.20: श्रद्धावीर्यस्मृतिसमाधिप्रज्ञापूर्वक इतरेषाम् ॥२०॥ 1.20. śraddhā-vīrya-smṛti-samādhi-praj...