Study a single sutra by selecting the pada (chapter) and then the sutra (verse).
Source: How to Know God: The Yoga Aphorisms of Patanjali (Swami Prabhavananda, Christopher Isherwood)
When these obstacles have been reduced to a vestigial for, they can be destroyed by resolving the mind back into its primal cause..
Source: English translation of the Yoga Sutras of Patanjali (Swami Jnaneshvara Bharati)
When the five types of colorings (kleshas) are in their subtle, merely potential form, they are then destroyed by their disappearance or cessation into and of the field of mind itself.