Spontaneous attraction to Kṛṣṇa, which is said to be due to the extraordinary mercy of the Lord, can be placed under two headings: one is profound veneration for the greatness of the Lord, and the other may be one’s automatically being attracted to Kṛṣṇa without any extraneous consideration. In the Narada-pancaratra it is said that if on account of profound veneration for the greatness of the Supreme Lord, one attains a great affection and steady love for Him, one is certainly assured of attaining the four kinds of Vaisnava liberation- namely, achieving the same bodily features as the Lord, achieving the same opulence as the Lord, dwelling on the planet where the Lord is residing, and attaining eternal association with the Lord. The Vaisnava liberation is completely different from the mayavada liberation, which is simply a matter of being merged into the effulgence of the Lord.
In the Narada-pancaratra pure unalloyed devotional service is explained as being without any motive for personal benefit. If a devotee is continuously in love with Lord Kṛṣṇa and his mind is always fixed upon Him, that devotional attitude will prove to be the only means of attracting the attention of the Lord. In other words, a Vaisnava who is incessantly thinking of the form of Lord Kṛṣṇa is to be known as a pure Vaisnava. Generally, a devotee who has achieved the causeless mercy of the Lord on account of following the strict rules and regulations of devotional service becomes attracted by the supreme greatness of the Lord, by the transcendental beauty of the Lord and by the spontaneous execution of devotional service. To be more clear, by executing the regulative principles of devotional service, one can fully appreciate the transcendental beauty of the Lord. In any case, such exalted positions are only possible by the extraordinary mercy of the Lord upon the devotee.
Source: A.C. Bhaktivedanta Swami Prabhupada (2011 edition), “The Nector of Devotion”, Page 145