The four Vedas, notably the hymns of the Rigveda, contain allusions to many mythological themes (see Rigvedic deities, Rigvedic rivers).
In the period of Classical Sanskrit, much mythological material is preserved in the Sanskrit epics, the Ramayana and the Mahabharata. Besides mythology proper, the voluminous epics also provide a plethora of information about ancient Indian society, philosophy, culture, religion and ways of life.
The Puranas deal with stories that are "mythologically" older than the epics (Purana is Sanskrit for "ancient"). The date of the Puranic texts as preserved however mostly post-dates the epics, dating to the Early Middle Ages.
The epics themselves are set in different Yugas (epochs) or periods of time in Hindu mythology. The Ramayana, written by the poet Valmiki, describes the life and times of Lord Rama (the seventh avatar of Lord Vishnu) and occurs in the sat yuga, while the Mahabharatha that describes the life and times of the Pandavas, occurs in the Dwapara yuga, a period associated with Lord Krishna (the eighth avatar of Lord Vishnu).
The Bhagavatham (also referred to as Srimad Bhagavatham or Bhagavatha Purana) is probably the most read and popular of the puranas. It chronicles the story of the god Vishnu and his incarnations (avataars) on earth.
The roots of mythology that evolved from classical Hinduism come from the times of the Vedic civilization, from the ancient Vedic religion.
The characters, theology, philosophy and stories that make up ancient Vedic myths are indelibly linked with Hindu beliefs. The Vedas are said to be four in number, namely RigVeda, YajurVeda, SamaVeda, and the AtharvaVeda. Some of these texts mention mythological concepts and machines very much similar to modern day scientific theories and machines.
Apart from the traditional human weapons like swords, daggers, spears, clubs, shields, bows, arrows and maces, and the weapons used by the Gods (such as Indra's thunderbolt Vajrayudha), the texts mention the utilization of various divine weapons by various heroes, each associated with a certain God or deity. These weapons are most often gifted to semi-divine beings, human beings or the rakshasas by the Gods, sometimes as a result of penance.
There are several weapons which were believed to be used by the Gods of the Hindu mythology, some of which are Agneyastra, Brahmastra, Chakram, Garudastra, Kaumodaki, Narayanastra, Pashupata, Shiva Dhanush, Sudarshana Chakra, Trishul, Vaishnavastra, Varunastra, and Vayavastra.
Some of these weapons are explicitly classified (for example, the Shiva Dhanush is a bow, the Sudharshan Chakra is a discus and the Trishul is a trident), but many other weapons appear to be weapons specially blessed by the Gods. For example, the Brahmastra, Agneyastra (Sanskrit: Astra = divine weapon, especially, one thrown at an opponent) and the other astras appear to be single use weapons requiring an intricate knowledge of use, often depicted in art, literature and adapted filmography as divinely blessed arrows.
Sometimes the astra is descriptive of the function, or of the force of nature which it invokes. The Mahabharata cites instances when the Nagastra (Sanskrit: Nag=snake) was used, and thousands of snakes came pouring down from the skies on unsuspecting enemies. Similarly, the Agneyastra (Agni) is used for setting the enemy ablaze, as the Varunastra (Varuna) is used for extinguishing flames, or for invoking floods. Some weapons like the Brahmastra can only be used (lethally) against a single individual.
Apart from the astras, other instances of divine or mythological weaponry include armor (Kavacha), crowns and helmets, staffs and jewellery (Kundala).
The story of a great flood is mentioned in ancient Hindu texts, particularly the Satapatha Brahmana. It is compared to the accounts of the Deluge found in several religions and cultures. Manu was informed of the impending flood and was protected by the Matsya Avatara of Lord Vishnu, who had manifested himself in this form to rid the world of morally depraved human beings and protect the pious, as also all animals and plants.
After the flood the Lord inspires the Manusmriti, largely based upon the Vedas, which details the moral code of conduct, of living and the division of society according to the caste system.
Hindu mythology is not only about Gods and men, but classifies a host of different kinds of celestial, ethereal and earthly beings.
Lord Brahma, out of his thought, creates seven sages, or Sapta Rishis, to help him in his act of creation. Sapta Rishis (sapta means seven and rishis mean sages in Sanskrit). They are Bhrigu, Angira, Atri, Gautama, Kashyapa, Vashishta, and Agastya. The other meaning of Saptarishis is constellation of Great Bear (Ursa Major).
Brahma is considered the ruler of the highest of the heavens (the world called Sathya), so in one sense, Brahma is not beyond the fourteen worlds as Shiva and Vishnu are.
Some gods are associated with specific elements or functions: Indra (the god of thunder and lightning; he also rules the world of Swarga), Varuna (the god of the oceans), Agni (the god of fire), Kubera (the treasurer of the gods), Surya (the sun god), Vayu (the god of wind), and Soma (the moon god).
Swarga also has a set of famous heavenly dancers: Urvasi, Menaka, Rambha, and Tilottama (all female), whose job is to entertain the heavenly court, and upon orders from the heavenly kings, to distract people on the earth from accumulating too much good deeds so as to become a threat to the heavenly kings.
Other notable inhabitants of the heavens include the celestial sages, and Narada the messenger of the gods.
Yama (the god of death and justice) is said to live in Kailash along with his master Shiva. He rules the lower world of Naraka with a band of emissaries called the Yama doota (messengers of Yama), who bring the souls of dead persons to Yama for evaluation. Chitragupta is one of those lower level celestial beings who functions as the karmic accountant of all the actions of the human beings on earth.
Ikshvaku was the son of Manu,the first mortal man, and founder of the Sun Dynasty.
The first king to conquer all of the world was Bharata, son of Dushyanta and Shakuntala. All of this world, Vishwa, is named Bharatavarsha, or The Land of Bharata, or The Cherished Land.
King Bharata's conquests are described to have stretched over all of modern India, and Pakistan, Bangladesh and Nepal, as well as the ancient Gandhara region of Afghanistan. No account has been known to exceed these geographical boundaries.