Transcendental literature is above the mode of darkness, and its light becomes more luminous with progressive reading and realization of the transcendental subject matter. The so-called liberated persons are never satisfied by the repetition of the words ahaṁ brahmāsmi. Such artificial realization of Brahman becomes hackneyed, and so to relish real pleasure they turn to the narrations of the Śrīmad-Bhāgavatam. Those who are not so fortunate turn to altruism and worldly philanthropy. This means the Māyāvāda philosophy is mundane, whereas the philosophy of Bhagavad-gītā and Śrīmad-Bhāgavatam is transcendental.
(Srimad Bhagavatam------1:1:19------purport).

Mahārāja Yudhiṣṭhira was not a mere tax collector. He was always conscious of his duty as a king, which is no less than that of a father or spiritual master. The king is to see to the welfare of the citizens from all angles of social, political, economic and spiritual upliftment. The king must know that human life is meant for liberating the encaged soul from the bondage of material conditions, and therefore his duty is to see that the citizens are properly looked after to attain this highest stage of perfection.
Mahārāja Yudhiṣṭhira followed these principles strictly, as will be seen from the next chapter. Not only did he follow the principles, but he also got approval from his old uncle, who was experienced in political affairs, and that was also confirmed by Lord Kṛṣṇa, the speaker of the philosophy of Bhagavad-gītā.
(Srimad Bhagavatam------1:9:49------purport).

Lord Śiva, speaking to Pārvatī-devī, foretold that he would spread the Māyāvāda philosophy in the guise of a sannyāsī brāhmaṇa just to eradicate Buddhist philosophy. This sannyāsī was Śrīpāda Śaṅkarācārya. In order to overcome the effects of Buddhist philosophy and spread Vedānta philosophy, Śrīpāda Śaṅkarācārya had to make some compromise with the Buddhist philosophy, and as such he preached the philosophy of monism, for it was required at that time. Otherwise there was no need for his preaching Māyāvāda philosophy. At the present moment there is no need for Māyāvāda philosophy or Buddhist philosophy, and Lord Caitanya rejected both of them. This Kṛṣṇa consciousness movement is spreading the philosophy of Lord Caitanya and rejecting the philosophy of both classes of Māyāvādī. Strictly speaking, both Buddhist philosophy and Śaṅkara's philosophy are but different types of Māyāvāda dealing on the platform of material existence. Neither of these philosophies has spiritual significance. There is spiritual significance only after one accepts the philosophy of Bhagavad-gītā, which culminates in surrendering unto the Supreme Personality of Godhead. Generally people worship Lord Śiva for some material benefit, and although they cannot see him personally, they derive great material profit by worshiping him.
(Srimad Bhagavatam------2:24:17------purport).

Śrī Kṛṣṇa, the Supreme Personality of Godhead and the ideal spiritual master, spoke the philosophy of Bhagavad-gītā to Marshal Arjuna, His disciple. Here is a perfect example of the relationship between the spiritual master and the disciple. Arjuna was a most intimate friend of Śrī Kṛṣṇa, and thus Śrī Kṛṣṇa explained to him the essence of all scriptures, in the philosophy of Bhagavad-gītā.
(Message of Godhead).

So Marshal Arjuna pretended to display weakness, placing himself in the category of ordinary people who are illusioned in the material world. And by this action of his, Marshal Arjuna helped in the manifestation of Bhagavad-gītā from the transcendental lips of the Personality of Godhead. Whenever the Personality of Godhead descends to this mortal world, He is accompanied by His confidential servants. Marshal Arjuna is the eternal, confidential servant of the Personality of Godhead, Śrī Kṛṣṇa, and thus the philosophy of Bhagavad-gītāwas taught to him directly for the benefit of the people in general.
(Message of Godhead).

Being an unalloyed devotee of the Personality of Godhead, Marshal Arjuna was able to discuss the transcendental philosophy of Bhagavad-gītā even on the battlefield of Kurukṣetra. We modern men have no time to get into the details of the philosophy of Bhagavad-gītā, even in the midst of our much more ordinary daily duties. But just to teach us, Marshal Arjuna tried to understand the philosophy of Bhagavad-gītā at a time when a moment was virtually impossible to spare. All this he did for the sake of people like us, and he fought the battle with full vigor once he had understood the philosophy of Bhagavad-gītā.
(Message of Godhead).

Affinity for family relations, which Marshal Arjuna displayed overwhelmingly in the manner of the typical modern man, is the sign of our lack of transcendental knowledge. But attaining transcendental knowledge does not necessarily mean renouncing the duties of our ordinary life. After Arjuna had understood the spirit of the philosophy of Bhagavad-gītā, the Personality of Godhead, Śrī Kṛṣṇa, never advised him to give up his seemingly ordinary duties. On the contrary, Arjuna fought the battle with even greater energy and vigor after he had obtained the transcendental knowledge imparted by Śrī Kṛṣṇa. The real spirit we attain through transcendental knowledge is self-negation and the determination to render transcendental service unto the Personality of Godhead. The purport of Bhagavad-gītā is this and nothing else.
(Message of Godhead).