There are three stages of devotional service: The first is the beginning stage of cultivation, the second is the realization of service, and the third, the supreme stage, is the attainment of love of Godhead. There are nine different methods of cultivating devotional service—hearing, chanting, remembering, etc.—and all these processes are employed by the neophyte in the first stage. If one is engaged in chanting and hearing with devotion and faith, his material misgivings gradually become vanquished. As his faith in devotional service increases more and more, he becomes assured of a higher perfectional position. In this way one becomes firmly fixed in devotional service, increases his taste for it, becomes attached to it, and feels ecstasy, the preliminary stage of love of Godhead. Attainment of ecstasy is produced by executing this process of cultivating devotional service. When one continues the process of hearing and chanting, attachment to Kṛṣṇa gradually thickens and at last is called love of Godhead.
In the stage of transcendental love of God there are further developments, known as transcendental affection, emotion, ecstasy, and extreme and intense attachment. These are technically known by the terms rāga, anurāga, bhāva and mahābhāva. The progress from one stage to another is like the thickening of sugarcane juice. In the first stage sugarcane juice is a thin liquid. When, by evaporation, it becomes thicker and thicker, it turns into molasses. Then it turns into granules of sugar, then rock candy, and so on. Just as sugarcane juice progresses from one stage to another, similarly transcendental love for the Supreme Lord develops by stages.
When one actually becomes situated on the transcendental platform, he becomes steady. Unless one is so situated, his position is not steady and he may fall down. When one is actually situated transcendentally, there is no fear of falling down. This stage is technically called sthāyi-bhāva. There are further developments within this stage, known as vibhāva, anubhāva, sāttvika and vyabhicārī. When these four ingredients are added to the steadfast position of pure transcendental life, there is actually an exchange of rasa, or transcendental mellows, with the Supreme Lord. This exchange in loving reciprocation between the lover and the beloved is generally called kṛṣṇa-bhakti-rasa, the transcendental taste of exchanging loving sentiments between the devotee and the Supreme Personality of Godhead. It should be noted, however, that the transcendental loving exchanges stand on the steadfast position of sthāyi-bhāva, as explained above. The basic principle of vibhāva is sthāyi-bhāva, and all other activities are auxiliary for the development of transcendental love.
The ecstasy of transcendental love has two components—the context and the cause of the excitement. The context is also divided into two parts—the subject and the object. The exchange of devotional service is the subject, and Kṛṣṇa is the object. His transcendental qualities are the causes of excitement. This means that a devotee who becomes enamored by the transcendental qualities of Kṛṣṇa becomes excited to serve Him. The impersonal (Māyāvādī) philosophers say that the Absolute Truth is nirguṇa, "without qualities," but the Vaiṣṇava philosophers say that the Absolute Truth is described as nirguṇa because He has no material qualities. This is not to say that He has no spiritual qualities. Indeed, the Lord's spiritual qualities are so great and so enchanting that even liberated persons become attracted to Him. This is explained in the ātmārāma verse of Śrīmad-Bhāgavatam (1.7.10), where it is said that those who are already situated on the platform of self-realization are attracted by the transcendental qualities of Kṛṣṇa. This means that Kṛṣṇa's qualities are not material but are pure and transcendental.
The highest stage of ecstasy is characterized by the following thirteen transcendental activities: (1) dancing, (2) rolling on the floor, (3) singing, (4) clapping, (5) stretching the body, (6) thundering, (7) yawning, (8) breathing heavily, (9) forgetting social conventions, (10) drooling, (11) laughing, (12) shaking the head, and (13) hiccoughing. All these symptoms are not awakened simultaneously; they appear according to the exchange of transcendental mellows. Sometimes one symptom is prominent, and at another time another is prominent.
There are five transcendental rasas, or mellows. The initial stage is called śānta-rati, wherein one who is liberated from material contamination appreciates the greatness of the Supreme Personality of Godhead. One who attains this stage does not exactly engage in the transcendental loving service of the Lord, for this is the neutral stage.
In the second stage, which is called dāsya-rati, a person appreciates his position as being everlastingly subordinate to the Supreme Lord, and he understands that he is eternally dependent on the causeless mercy of the Supreme Person. At that time there is an awakening of natural affection, such as is felt by a son who grows up and begins to appreciate his father's benedictions. At this stage the living entity wants to serve the Supreme Lord instead of serving māyā, illusion.
The third stage in the development of transcendental love is called sakhya-rati. In this stage one associates with the Supreme as a friend on an equal level, with love and respect. As this stage is further developed, there is joking and such relaxed exchanges as laughing. On this level there are fraternal exchanges with the Personality of Godhead, and one is free from all bondage. At this stage one forgets his inferior position as a living entity, but at the same time he has the greatest respect for the Supreme Person.
In the fourth stage, called vātsalya-rati, the fraternal affection of the preceding stage develops into parental affection. At this time the living entity acts as the parent of God. Instead of worshiping the Lord, the living entity, as a parent of the Supreme Person, becomes an object of worship for Him. At this stage the Lord depends on the mercy of His pure devotee and puts Himself under the control of the devotee to be raised nicely. Such a devotee can embrace the Supreme Lord and even kiss His head.