Viṣṇudūta, representative of Lord Viṣṇu, challenged the Yamadūta that, "If you are representative of Yamarāja, who is supposed to be one of the authorities of religion, then you must explain what is religion, dharma, and what is nonreligion, or adharma, because, according to this principle, one is punished or rewarded. If you become religious, then you are rewarded, and if you are irreligious, then you are punished."
That is stated in the Bhagavad-gītā also:
- ūrdhvaṁ gacchanti sattva-sthā
- madhye tiṣṭhanti rājasāḥ
- adho gacchanti tāmasāḥ
- (BG 14.18)
How a man is going to heaven or hell, one can understand from the direction of the scriptures, just like you can understand how a man is going to be punished or rewarded within this material world. If you see somebody is working very hard, doing nicely, you can conjecture that, "This man will be happy." Say, for example, if a boy is studying very nicely, you can conjecture that "This boy will rise very highly in his future life."
And similarly, if a boy is whiling away his time by playing, you can understand, "This boy is being spoiled." Similarly, by the direction of the scripture, you can understand what is the destination of a certain person. Therefore they say śāstra-cakṣuṣaḥ. Whether I am progressing or regressing, that will be understood through the eyes of śāstra, not in ordinary eyes.