He cited a verse from Śrīmad-Bhāgavatam (9.5.16) spoken by Durvāsā Muni, a great mystic yogī who considered himself very elevated and envied Mahārāja Ambarīṣa, who was known as the greatest devotee of the time. In an attempt to harass Mahārāja Ambarīṣa, Durvāsā Muni had met with a great catastrophe and been defeated by the Sudarśana cakra of the Lord. Durvāsā Muni admitted his fault and said, "For pure devotees who are always engaged in the transcendental loving service of the Lord, whose very name is sufficient for liberation, nothing is considered impossible."
In the Stotra-ratna (43), Yāmunācārya writes: "My Lord, those who keep themselves independent of Your service are helpless. They work on their own account and thus receive no support from superior authority. Therefore I long for the time when I shall engage fully in Your transcendental loving service without any desire for material satisfaction and without hovering on the mental plane. Only when I engage in such unalloyed devotional service will I enjoy actual spiritual life."