Su-medhasaḥ, those who are possessing nice brain, not dull. Because the yajña was performed in the Vedic yuga, so we have to perform yajña again the same style—that is not possible. You cannot get even the ghee, and so many things, that is not possible. Therefore śāstra says, yajñaiḥ saṅkīrtana-prāyair yajanti hi su-medhasaḥ: those who are intelligent persons, they perform the saṅkīrtana yajña, as it is being done here. Saṅkīrtana . . . no other yajña is possible to be done in this age, but this can be done, and anyone can take part in it. We have seen practically, even the small children, they are also doing. This is real yajña.
And tattva-vijñāsa . . . this saṅkīrtana-yajña and tattva-vijñāsa means hear something from Śrīmad-Bhāgavatam, Bhagavad-gītā. That makes your life perfect. Jīvasya tattva-vijñāsa nartho yaś ceha karmabhiḥ. No other karma . . . no other karma-kāṇḍīya ritual. Simply this yajña should be performed.
Now, unless we take to tattva-jijñāsa, we cannot get out of these material clutches. Inquisitiveness: "What is the Absolute Truth?" Now Śrīmad-Bhāgavata directly gives you information what is tattva-vit, what is that Absolute Truth. That Absolute Truth is described here, vadanti tat tattva-vidas tattvam (SB 1.2.11). Tattva vidaḥ. Tattva vidaḥ means one who knows the Absolute Truth. You cannot understand what is Absolute Truth who is not tattva-vit. Tattva-vit means one who knows the Supreme Personality, he is actually vedaiś ca sarvair aham eva vedyo.
So by studying Vedas, if one comes to the point of understanding Kṛṣṇa, then he is tattva-vit. Otherwise partial. That is explained here. Vadanti tat tattva-vidas tattvaṁ yaj jñānam advayam (SB 1.2.11). Tattva-jñāna, there is no difference, tattva-jñāna, but there are different angles of vision, angles of . . . brahmeti paramātmeti bhagavān iti śabdyate, but the different capacity. This I have explained many times. Just like from darkness you come to the light, tamasi mā jyotir gamaḥ. Come to the light. So the example is, just like you are in dark room, and your friend or you want to come to the light, come to the sunlight. So this tattva-jñāna, light, is also the sunshine, has connection with the sun. And paramātmā, brahmeti paramātmeti and bhagavān.
So tattva-jñāna, those who are trying to understand the Absolute Truth by mental speculation or mental exercises . . . there are many parties, they are . . . they are called theosophists and many others, they are trying to understand. So those who are trying to understand the Absolute Truth by their own knowledge, not from the knowledge of the Supreme . . . our process is avaroha panthā, descending process, and the Māyāvādī philosopher's policy or system is ascending policy. I want to understand the Absolute Truth by exercising my mental power—that is called ascending process, or inductive process. But our process is deductive process.
We, Kṛṣṇa says, mattaḥ parataraṁ nānyat kiñcid asti dhanañjaya (BG 7.7). We take it, we immediately take it, that Kṛṣṇa is the Supreme Personality of Godhead. We are not going to search out who is the Supreme. Because we are hearing from the Supreme, Kṛṣṇa, then our business is finished: "Here is the Supreme." So this is very natural. You are searching after the Supreme. This is one process, by your own dint of knowledge; and another person is getting the knowledge directly from the Supreme—who is perfect?
This is perfect process. Evaṁ paramparā-prāptam imaṁ rājarṣayo viduḥ (BG 4.2), Kṛṣṇa says in the Bhagavad-gītā. The perfect knowledge received from Kṛṣṇa. From Kṛṣṇa, the knowledge was received by Brahmā. From Brahmā the knowledge was received by Nārada. From Nārada the knowledge was received by Vyāsadeva. From Vyāsadeva the knowledge was received by Madhva Muni. In this way, paramparā-sūtra, the same knowledge was received by Mādhavendra Purī. From Mādhavendra Purī, Īśvara Purī received the knowledge. From Īśvara Purī, Lord Caitanya received the knowledge. From Lord Caitanya, the six Gosvāmīs. In this way there is a paramparā system, handing down the knowledge from disciplic . . . from disciple to disciple, evaṁ paramparā. That is perfect knowledge.