Dharma (religiosity), artha (economic development), kama (sense gratification) and moksa (liberation) are the four principles of religion that pertain to the material world. Therefore in the beginning of Srimad-Bhagavatam it is declared, dharmah projjhita-kaitavo 'tra: cheating religious systems in terms of these four material principles are completely discarded from Srimad-Bhagavatam, for Srimad-Bhagavatam teaches only how to develop one's dormant love of God. The Bhagavad-gita is the preliminary study of Srimad-Bhagavatam, and therefore it ends with the words, sarva-dharman parityajya mam ekam saranam vraja: "Abandon all varieties of religion and just surrender unto Me." (Bg. 18.66) To adopt this means, one should reject all ideas of religiosity, economic development, sense gratification and liberation and fully engage in the service of the Lord, which is transcendental to these four principles. Love of Godhead is the original function of the spirit soul, and it is as eternal as the soul and the Supreme Personality of Godhead. This eternity is called sanatana. When a devotee revives his loving service to the Supreme Personality of Godhead, it should be understood that he has been successful in achieving the desired goal of his life. At that time everything is automatically done by the mercy of the holy name, and the devotee automatically advances in his spiritual progress.