What is the source of understanding Kṛṣṇa? Śrīmad-Bhāgavatam. Amalaṁ purāṇam. If you study Śrīmad-Bhāgavatam, then you attain all these things. Śrī-caitanya-mahaprabhor matam idam. And premā pumartho mahān. So the book, Śrīmad-Bhāgavatam; the ideal worship, the damsels of Vṛndāvana; Kṛṣṇa is the worshipable object; and the necessary of life, necessity of life, is to attain love of Godhead. This is the whole mission of Caitanya Mahāprabhu, sum and substance.
Therefore Caitanya Mahāprabhu is saying here, puruṣartha-śiromaṇi prema mahā-dhana. People are . . . have their objective of life, everyone. Dharmārtha-kāma-mokṣa (SB 4.8.41). Their objective of life is . . . of course, nowadays people are different. Formerly . . . it is Vedic version, dharma, to make them religious. Therefore every civilized nation has some sort of religion. Religious . . . because without becoming religious, there is no possibility of peace and prosperity. So this is one of the aim of human society: religious.
And why religious? Dharma-artha. Then the economic condition will be better. If all people are religious, then economic condition will be better. Dharma-artha. And why economic condition better wanted? Kāma. Kāma means then the necessities of your life will be fulfilled nicely. Dharma, artha, kāma then moksa. Then what is the end? That if you are peacefully in the society, then you can culture for your liberation. So dharmārtha-kāma-mokṣa (SB 4.8.41).