One obtains another kind of piety by strictly executing his duties under the system of varṇāśrama-dharma, a social system containing four spiritual orders and four social orders. Learned sages have long propagated this system. As the Viṣṇu Purāṇa (3.8.9) states,
- varṇāśramācāravatā
- puruṣeṇa paraḥ pumān
- viṣṇur ārādhyate panthā
- nānyat tat-toṣa-kāraṇam
- (CC Madhya 8.58)
The Supreme Personality of Godhead, Lord Viṣṇu, is worshiped by the proper execution of prescribed duties in the system of varṇa and āśrama. There is no other way to satisfy the Supreme Personality of Godhead. One must be situated in the institution of the four varṇas and āśramas.
The brāhmaṇas (the intellectual, priestly class), the kṣatriyas (kings and administrators), the vaiśyas (the mercantile community), and the śūdras (menial workers) are the four social orders, or varṇas. If they live according to the scriptural injunctions pertaining to their particular varṇa, then they can accrue piety. Similarly, if the members of the four āśramas—namely, the brahmacārīs (celibate students), gṛhasthas (householders), vānaprasthas (pilgrims), and sannyāsīs (renunciants)—also act in conformity with the scriptural edicts, they too acquire immense piety.