It is confirmed in the Bhagavad-gītā that the purpose of Vedic knowledge is to find Kṛṣṇa. And it is said in the Brahma-saṁhitā that it is very difficult to find Kṛṣṇa, the Supreme Personality of Godhead, by systematic reading of the Vedic literature. But He is very easily available through the mercy of a pure devotee. The pure devotees of Vṛndāvana are fortunate because they can see Mukunda (Lord Kṛṣṇa) all the time. This word mukunda can be understood in two ways. Muk means liberation. Lord Kṛṣṇa can give liberation and therefore transcendental bliss. The word also refers to His smiling face, which is just like the kunda flower. Mukha means "face." The kunda flower is very beautiful, and it appears to be smiling. Thus the comparison is made.
The difference between the pure devotees of Vṛndāvana and devotees in other places is that the residents of Vṛndāvana have no other desire but to be associated with Kṛṣṇa. Kṛṣṇa, being very kind to His devotees, fulfills their desire; because they always want Kṛṣṇa's association, the Lord is always prepared to give it to them. The devotees of Vṛndāvana are also spontaneous lovers. They are not required to strictly follow regulative principles because they are already naturally developed in transcendental love for Kṛṣṇa. Regulative principles are required for persons who have not achieved such a position of spontaneous love. Brahmā is also a devotee of the Lord, but he is an ordinary devotee subject to following regulative principles. He prays to Kṛṣṇa to give him the chance to take birth in Vṛndāvana so that he might be elevated to the platform of spontaneous love.