sentences:  This has led certain Indologists like Prof. Robert J. Zydenbos to call Jainism, essentially, a system of yogic thinking that grew into a full-fledged religion.The five yamas or the constraints of the "Yoga Sutras of Patanjali" bear a resemblance to the five major vows of Jainism, indicating a history of strong cross-fertilization between these traditions.Later works also provide their own definitions of meditation.