In plain words
'That by which one knows' — that is why it is called Veda. This means that a human being can grasp both the karma-kāṇḍa and the jñāna-kāṇḍa through the strength of the Veda alone. The Vedas teach a person's duty from birth to death — that is, they explain in full every stage of a human life. It was to help grasp this essence of the Veda that the Vedangas, the Puranas, and the Itihasas came into being over time. So if human beings wish to grasp what true humanity is, they must first come to understand the pre-eminence of the Veda and the Vedangas. For this very reason, the Bharatiya forefathers of ancient times made it compulsory to teach the Vedangas in the gurukulas before beginning the study of the Veda itself; in that era, Bharatiyas studied all fourteen branches of learning.
In the Vedic education of those days, great importance was placed on the art of memorization. It was the custom then to call one who had completed Vedic study 'jaḍa' — dull, or inert. But this did not mean that he knew nothing, or understood nothing; one should not think so. Its real meaning is that everything becomes clear to one who has undergone Vedic study — it has been said that, through such study, a human being can even become omniscient. Therefore the Bharatiya Paramartha Vahini has, throughout, held that undertaking Vedic study is essential for the fulfillment of one's life, and that the authority of the Vedas remains the guiding principle of a Bharatiya's daily life.