When Rāmānanda Rāya was questioned by Śrī Caitanya Mahāprabhu: "What is sādhya and sādhana, what is human duty, sādhya, and what is the end of sādhana . . .?" Sādhana, sādhana means cultivating something with a aim of objective. So this question was put to Rāmānanda Rāya by Śrī Caitanya Mahāprabhu: "What is the aim of human life and what is the process of executing that will?"
So immediately Rāmānanda Rāya said that varṇāśramācāravatā: the beginning of human life is to execute the varṇāśrama-dharma. Varṇāśramācāravatā puruṣeṇa paraḥ pumān (CC Madhya 8.58). Why varṇāśrama? Now, viṣṇur ārādhyate. If you properly execute your varṇāśrama-dharma . . . actually, it is now pervertedly spoken as Hindu dharma.
Hindu dharma is a vague term. Real dharma is varṇāśrama-dharma. Hindu dharma we don't find, any Vedic literature. Neither in the Bhagavad-gītā. It is a, a nomenclature given by the Muhammadans—"Hindus." From Sindhu, "Hindu." Anyway, now we are known as Hindus.
The "Hindu" is a vague term. Real term is varṇāśrama, varṇāśrama: four varṇas and four āśramas. This is dharma and this is given by God Himself. Just like Kṛṣṇa says, cātur-varṇyaṁ mayā sṛṣṭaṁ guṇa-karma-vibhāgaśaḥ (BG 4.13). It is given by God. You cannot manufacture dharma, religion. No. Dharmaṁ tu sākṣād bhagavat-praṇītam (SB 6.3.19): "Dharma means the codes, the regulation, given by God." That is dharma. That is dharma. Otherwise, it is not dharma.