When that ecstatic state of being is enriched with love of Kṛṣṇa and the transcendental experience, one gradually attains to the mature oneness of spiritual life. Such spiritual life is not possible for those who are not situated in Kṛṣṇa consciousness and devotional service. This fact is further corroborated in the Bhakti-rasāmṛta-sindhu wherein it is said: "It is very difficult for the nondevotee to understand the taste of devotional service. Only one who has completely taken shelter of the lotus feet of Kṛṣṇa and whose life is merged in the ocean of devotional service can understand this transcendental pleasure."
Lord Caitanya thus explained briefly the transcendental situation and spiritual enjoyment of life, and He taught that the first stage of perfection is to become a religious man in the ordinary sense, as known in the material world. The second stage of perfection is to become materially rich. The third stage of material perfection is the attainment of complete sense enjoyment, and in the fourth stage there is knowledge of liberation. Above this platform are those on the fifth stage who are already liberated and who are established in Kṛṣṇa consciousness or devotional service to the Lord. In the highest perfection of devotional service in Kṛṣṇa consciousness, one experiences the taste of the ecstasy of spiritual relish.