Kṛṣṇa was very expert in dealing with people according to circumstances, country, time and paraphernalia. How He could take advantage of a particular time, circumstance and person is expressed by Him while talking to Uddhava about His rāsa dance with the gopīs. He says: "The most opportune time is the full moon night in autumn, like tonight. The best place within the universe is Vṛndāvana, and the most beautiful girls are the gopīs. So, My dear friend Uddhava, I think I should now take advantage of all these circumstances and engage Myself in the rāsa dance." 20. Seer by the Authority of the Scriptures
A person who acts exactly according to the tenets of scripture is called śāstra-cakṣus. Śāstra-cakṣus means one who sees through the eyes of the authorized scriptures. Actually, any man of knowledge and experience should see everything through these books. For example, with our naked eye we perceive the sun globe simply as some glaring substance, but when we see through authorized books of science and other literature, we can understand how much greater the sun globe is than this earth and how powerful it is. So seeing things through the naked eye is not actually seeing. Seeing things through the authorized books or authorized teachers is the correct way to see. So, although Kṛṣṇa is the Supreme Personality of Godhead and can see all that is past, present and future, to teach the people in general He used to always refer to the scriptures. For example, in the Bhagavad-gītā, although Kṛṣṇa was speaking as the supreme authority, He still mentioned and quoted Vedānta-sūtra as authority. There is a statement in the Śrīmad-Bhāgavatam wherein a person jokingly says that Kṛṣṇa, the enemy of Kaṁsa, is known as the seer through the śāstras. In order to establish His authority, however, He is now engaged in seeing the gopīs, whereby the gopīs are becoming maddened.
There are two kinds of supreme purity. When one type is possessed, one is able to deliver a sinful person. When the other type is possessed, one does not do anything which is impure. A person who possesses either of these qualities is called supremely pure. Kṛṣṇa is both; He can deliver all sinful conditioned souls, and at the same time, He never does anything by which He can be contaminated.
In this connection, Vidura, while trying to detach his elder brother, Dhṛtarāṣṭra, from his familial attachments, said, "My dear brother, you just fix your mind on the lotus feet of Kṛṣṇa, who is worshiped with beautiful erudite verses by great sages and saintly persons. Kṛṣṇa is the supreme deliverer amongst all other deliverers. Undoubtedly there are great demigods like Lord Śiva and Lord Brahmā, but their positions as deliverers depend always upon the mercy of Kṛṣṇa." Therefore Vidura advised his elder brother Dhṛtarāṣṭra to concentrate his mind and worship only Kṛṣṇa. If one simply chants the holy name of Kṛṣṇa, this holy name will rise within one's heart like the powerful sun and will immediately dissipate all the darkness of ignorance. Vidura advised Dhṛtarāṣṭra to therefore think always of Kṛṣṇa so that the volumes of contaminations due to sinful activities would be washed off immediately. In the Bhagavad-gītā (10.12) also Kṛṣṇa is addressed by Arjuna as paraṁ brahma paraṁ dhāma pavitram—the supreme pure. There are many other instances exhibiting Kṛṣṇa's supreme purity.