The yogi is higher than the ascetics, and is held to be higher even than the men of knowledge; the yogi is also higher than those who perform rituals. Therefore, Arjuna, become a yogi.
Explanation
Krishna is concluding his teaching to Arjuna on the practice of meditation and the fruit of a yogi's effort. Here he ranks the yogi, one who is steadily united (yoga) with the divine through disciplined practice, above austere ascetics (tapasvin), the learned (jñānin) and those devoted to ritual action (karmin). Traditions differ on the word jñānin: some take it as scholars of scripture, others as knowers of the self. Either way, Krishna ends with a direct call to Arjuna to become a yogi.