When you overcome delusion, your mind will no longer be captivated by words of reward.

The term "muddy swamp" is used to describe confusion because it makes one's judgment unable to move forward, just like being caught in a swamp. Arjuna's heart, covered with affection for his relatives and fear of death, was also in a state where he could not distinguish what should be done.

It is said that when the heart completely transcends that quagmire, it becomes indifferent to pleasures in this world and the next life, whether those promises have already been heard or will be heard in the future. This does not mean becoming apathetic. Rather, detachment arises as a result of distinguishing between fleeting rewards and eternal goals, allowing the mind to regain its original clarity of judgment.

Japanese Translation from the Geeta Press Edition - Chapter 2, Section 52: "When Crossing the Quagmire of Illusion"

Here, I have shown that by practicing Karma Yoga, one can reach the highest abode of God or the ultimate state of bliss. At this point, Arjuna might ask when and how one can attain such a dwelling place or state. Therefore, the following two verses address this question.

Sanskrit original text

यदा ते मोहकलिलं बुद्धिर्व्यतितरिष्यति ।
तदा गन्तासि निर्वेदं श्रोतव्यस्य श्रुतस्य च ॥ ५२ ॥

Romanization

yadā te moha-kalilaṃ buddhir vyatitariṣyati |
tadā gantāsi nirvedaṃ śrotavyasya śrutasya ca || 52 ||

When your heart completely transcends the mire of delusion, you will become indifferent to pleasures in this world and future lives, whether you have already heard about them or are about to hear about them. (52)

In this section, the term Mohakalila refers to what is called Kaśmala in the second section, and it signifies the delusion that afflicted Arjuna. It arose from his attachment to relatives and friends, and his fear of their deaths. This delusion caused confusion in Arjuna's mind, making it impossible for him to correctly judge his duties. This delusion is a kind of impurity that clouds the mind, prevents intelligence from reaching correct decisions, and obscures truth.

This impurity is removed by distinguishing between what is permanent and what disappears, discerning between what should be done and what should not be done, establishing proper obligations through interaction with the enlightened, performing them selflessly, directing the heart towards God, and abandoning worldly attachments and desires.

That is what it means to transcend the quagmire of delusion.

Śruta includes pleasures that have already been seen, heard, and experienced in this world and the next. Śrotavya refers to pleasures that may be seen, heard, or experienced in the future. To view all of these as temporary and not conducive to self-realization, and to completely eliminate attachment to them, is Nirveda, which means a state of indifference. In this verse, the Lord states that after delusion has disappeared, Arjuna's mind regains its original clarity and attains true detachment from all transient objects in this world and the next.