Contemplation, which forms an obligatory practice with Yogins, is their highest power, Those conversant with Yoga say that that Contemplation is of two sorts.
योगकृत्यं तु योगानां ध्यानमेव परं बलम्। तच्चापि द्विविधं ध्यानमाहुर्विद्याविदो जनाः॥