Broadly speaking, there are two kinds of philosophy: Speculative and applied. All Yogic theory emerges from practice and experience. The book that fully contains and distills the ages of experience of master Yogis is The Yoga-Sūtra of Patanjali. With study in The Yoga-Sūtra, a practitioner’s practice will become full and complete.
In light of the above points, The Yoga-Sūtra submits human consciousness to the scientific method and stimulates high level critical thinking. The Yoga-Sūtra proposes a system that, if followed carefully over time, leads to the disappearance of the wave-making action (turbulence) in the energy field we call the mind, what we refer to, generally speculatively, as “peace of mind.”