Arjuna's question concerns those who worship without reference to any scriptural rule. They set aside the directive of revealed and remembered scripture and worship gods and the like, yet they do so 'endowed with faith', that is, joined to the conviction that what they revere is real. Such people see no rule, whether grounded in revelation or in remembrance, but worship the gods simply because they have watched their elders do so, and they do it trustingly. These are the ones meant by 'they set aside the scriptural rule and worship, endowed with faith'. This must be distinguished from another case. Some people do find a scriptural rule, recognise it, and still abandon it, worshipping the gods in a way the rule does not sanction. They are not the ones spoken of here. The reason is the qualifier 'endowed with faith'. One cannot suppose that a man who actually sees a scripture prescribing how to worship a god would set it aside out of disbelief and then turn faithfully to that very worship the scripture enjoins. So it is only the first group, who worship faithfully having set the rule aside, that the question is about. Arjuna asks: what is the standing of such people, Krishna, is it sattva, or rajas, or tamas? In other words, the worship they offer to gods and the rest, is it of the nature of sattva, of rajas, or of tamas? Since the question is put in general terms and cannot be answered without first drawing distinctions, the Blessed Lord replies.
Contemporary English rendering of the Sanskrit bhāṣya, pending scholar review.