Study a single sutra by selecting the pada (chapter) and then the sutra (verse).
Source: English translation from The Yoga Sutras of Patanjali (Sri Swami Satchidananda)
By the practice of the limbs of Yoga, the impurities dwindle away and there dawns the light of wisdom, leading to discriminative discernment
Source: English translation from Light on the Yoga Sutras of Patanjali (B.K.S. Iyengar)
By dedicated practice of the various aspects of yoga impurities are destroyed: the crown of wisdom radiates in glory.
Source: How to Know God: The Yoga Aphorisms of Patanjali (Swami Prabhavananda, Christopher Isherwood)
As soon as all impurities have been removed by the practice of spiritual disciplines -- the "limbs" of yoga -- a man's spiritual vision opens to the light-giving knowledge of the Atman.
Source: English translation from The Heart of Yoga (T.K.V. Desikachar)
The practice and inquiry into different components of Yoga gradually reduce the obstacles such as misapprehension. Then the lamp of perception brightens and the distinction between what perceives and what is perceived becomes more and more evident. Now everything can be understood without error.
Source: English translation of the Yoga Sutras of Patanjali (Swami Jnaneshvara Bharati)
Through the practice of the different limbs, or steps to Yoga, whereby impurities are eliminated, there arises an illumination that culminates in discriminative wisdom, or enlightenment.