The Vedas are a collection of religious texts that originated in ancient India. Hindus regard them as sacred and divide them into four major collections: the Rigveda, the Yajurveda, the Samaveda, and the Atharvaveda.

1. The Rigveda is the oldest and most important of the Vedas. It consists of 1028 hymns, many of which are addressed to various deities. The Rigveda is divided into 10 books, or mandalas.
2. The Yajurveda consists of sacrificial formulas and instructions for the performance of rituals.
3. The Samaveda consists of hymns that are chanted during the performance of sacrificial rituals.
4. The Atharvaveda is a collection of spells and incantations.

The Vedas are the earliest Hindu scriptures and are revered by Hindus.

The main theme of the Vedas is “Dharma”, which includes both the universal laws of nature and the specific duties of individuals. Dharma is often described as the 'law of righteousness' or the 'law of truth.' It is the foundation of Hindu ethics and morality. Dharma is the principle of right action and is often represented by the image of a scale, with Dharma on one side and Adharma (action that is opposed to Dharma) on the other. The Vedas teach that Dharma must be followed in order to maintain balance and harmony in the universe.  The Vedas were composed in Sanskrit, the language of the gods, and were passed down orally from generation to generation. They were finally written down around 1000 BCE. 

The Vedas are divided into four main sections: the Samhitas (hymns), the Brahmanas (ritual texts), the Aranyakas (forest texts), and the Upanishads (philosophical texts). The Vedas contain a wealth of knowledge about Hindu theology, philosophy, and mythology. They are also a source of great inspiration for Hindu poetry and music. The Vedas are still studied and revered by Hindus today.