tatra sattvam nirmalatvat
prakasakam anamayam
sukha-sangena badhnati
jnana-sangena canagha

"O sinless one, the mode of goodness, being purer than the others, is illuminating, and it frees one from all sinful reactions. Those situated in that mode become conditioned by a sense of happiness and knowledge."

Anagha = blemishless [Arjuna], 'destroy your rajo and tamo qualities and develop sattva quality' says Sri Krishna. But Arjuna should not be bonded by the sattva quality also. Tatra = there [amidst the three qualities], sattvam = sattva quality, nirmalatvat = is without any blemish. It is without the blemish of covering or blocking the natural qualities of Atman - Gyana or knowledge, and Ananda or bliss. As a corollary, rajo and tamo qualities will block Atman's natural qualities. Rajo and Tamo qualities have the blemish of hiding Atman's gyana and Ananda. This blemish is not there in sattva quality. It is like dust blocking the brightness of a jewel. The brightness is already there, but it is blocked. Likewise, Atman's gyana is blocked by these qualities. Sattva quality does not block. Is it then better to develop sattva quality? Sattva quality can be developed by our food habits. We have to carefully select what we eat both for health and for developing sattva quality. Prakasakam = it nourishes Atman with Gyana and Ananda. That is, like removing the dust covering the jewel, it brightens the Gyana and Ananda of Atman. Anamayam = [provide] diseaseless [life]. Thus sattva quality will make life without disease, will brighten Gyana and Ananda in Atman and will be free of the blemish of blocking Gyana and Ananda nature of Atman. Arjuna got a doubt. The Lord was to tell how sattva quality binds Atman in this samsara. But sattva quality is praised, why? Yes, compared to rajo and tamo qualities, sattva quality is certainly superior. But a danger is associated. We have seen in life that any good thing also has some disadvantages. Excepting the Lord, this rule is universal. We take very superior and costly medicine, but some side effects do appear. The Lord explains the disadvantages. Sukha-sangena = [sattva quality develops] interest in [worldly] happiness [or comfort]. Similarly, jnana-sanghena = interest in knowledge. Sattva quality encourages acquiring more knowledge and more happiness. Here, sattva quality will induce happiness derived from Shastras accepted activities; while rajo and tamo qualities will impel the person to seek happiness, whether Shastras approved or not. But any worldly happiness will again yield rebirth and involve in samsara repeatedly. Thus sattva quality tries to develop happiness and knowledge, and so the person takes efforts to achieve them and in the process, acquires more Papa/Punya and consequent rebirth. Thus sattva quality also binds us in samsara. What is the solution, then? The Lord answers this question in later slokas, for which we will wait. But worshipping the Lord, we will be blessed with divine knowledge and happiness, which will not tempt us to be bonded in samsara. Though Erumbi village does not have any temple, Swami Erumbiappa's Murthy is in the temple of Sri Bhaktochita. Worshipping these idols will develop sattva quality of superior nature. 
                                                                              (continued)