CC Madhya 11.192
yaj-jihvāgre vartate nāma tubhyam
tepus tapas te juhuvuḥ sasnur āryā
brahmānūcur nāma gṛṇanti ye te
The word Āryan means advanced. Unless one is spiritually advanced, he cannot be called an Āryan, and this is the difference between Āryan and non-Āryan. Non-Āryans are those who are not spiritually advanced. By following the Vedic culture, by performing great sacrifices and by becoming a strict follower of the Vedic instructions, one may become a brāhmaṇa, a sannyāsī or an Āryan. It is not possible to become a brāhmaṇa, sannyāsī or Āryan without being properly qualified. Bhāgavata-dharma never allows one to become a cheap brāhmaṇa, sannyāsī or Āryan. The qualities or qualifications described herein are quoted from Śrīmad-Bhāgavatam (3.33.7) and were spoken by Devahūti, the mother of Kapiladeva, when she understood the influence of devotional service (bhakti-yoga). In this way Devahūti praised the devotee, pointing out his greatness in all respects.