The Vedas are the most important and authoritative texts in the Dharmic knowledge system.Veda is anantha (infinite). Only an infinitesimal portion of it is revealed to humans. This can be understood in the sense that knowledge is infinite. However, Veda is the knowledge of Brahman, the True, Absolute and the Infinite. Realizing the infinite through any single mantra/sukta of the Veda is equivalent to understanding the essence of any other mantra and the entire Veda. Veda is anadi, having no beginning or end. It said to exist eternally; it is called the breath of Paramatma.

You might think what is difference between scientific knowledge and vedic knowledge?

Science is knowledge of nature to the extent that man has been able to discover it, Veda is the quintessential knowledge of all that is, including nature, all that happens, all that we are, all that we do, and all that we reap in consequence of our action.

Veda is apourusheya, not authored by humans. The seers are said to reveal veda mantras to the world, they are called drastas. Rigveda says catvari vak parimita padani , meaning vak exists in four forms and the learned know of them. Three are hidden and the fourth is what men speak. Vak (literally word, but meaning veda mantra here) is said to exist in four forms - para, pasyanti, madhyama and vaikhari. Para is the eternal form of vak. Pasyanti is when a seer envisions the mantra. Madhyama is when it descends into mind plane. Vaikhari is the expression. Thus the Veda mantras exist eternally, they are only revealed to the world by the seers.

Though there are four Vedas, there are alternate recitations in each Veda. These are called 'pathantaram'. Based on these, various branches exist in each Veda, each of them is called a Veda sakha. They consist of four main books: Rigveda, Yajurveda, Samaveda, and Atharvaveda. The Rigveda contains prayers to the gods, the Yajurveda explains how to use those prayers for sacrifices, the Samaveda introduces musical notes, and the Atharvaveda provides guidance for a successful life and material aspirations.

Each Veda is divided into three sections: Samhita (prayers), Brahmana (sacrificial methods), and Aranyaka (forest practices, including Upanishads).

Upanishads are philosophical writings found in the last part of the Veda, called Vedanta. There are 108 Upanishads, with 10 of them being well-known.

The four sections of the Vedas are associated with the four stages of life (Ashramas). Brahmacaris (students) study the Samhita, Grhasthas (householders) follow the Brahmana, Vanaprasthis (those preparing for a hermit life) follow the Aranyaka, and Sanyasis (renunciants) contemplate on the Upanishads. The Vedas and Upanishads contain profound knowledge that has guided Hindu culture and spirituality for centuries.

The remaining 2 vedas will be uploaded in due time.