Yoga Sūtra Chapter Three Title

विभूतिपादः

vibhūti-pādaḥ

The section on Special Manifestation.

vibhūti - special manifestationpāda - section; a quarter, a fourth part; foot, leg; on foot; the act of locomotion

Commentaries and Reflections

T Krishnamacharya:

“The practice which is Śodhana for the Antar Aṅga
is Antaraṅga Sādhana.”
– T Krishnamacharya introduction to Yoga Sūtra Chapter Three

Paul Harvey:

“In the Yoga Sūtra, the pre-eminent text on Dhyānam within Yoga.
Book One is about the Process of the practice of Dhyānam;
Book Two is about the Preparation for the practice of Dhyānam;
Book Three is about the Outcome of the practice of Dhyānam;
Book Four is about the Goal of the practice of Dhyānam.”