Āyurveda

Āyurveda (āyus = life + veda = knowledge) is the world's oldest systematic medical tradition. Its foundational texts — the Charaka Saṃhitā, the Suśruta Saṃhitā, and the Aṣṭāṅgahṛdayam — were composed between 600 BCE and 700 CE and represent the accumulated medical knowledge of a civilization that had been observing, classifying, and treating disease for millennia before the texts were written down. The Charaka Saṃhitā alone covers internal medicine, pharmacology, embryology, genetics, psychology, and surgery across eight major branches. The Āyurvedic definition of health (quoted in Suśruta Saṃhitā 15.41) is remarkable for its completeness: "Sama-doṣa, sama-agni, sama-dhātu-mala-kriyaḥ, prasanna-ātmendriya-manaḥ — svasthaḥ ityabhidhīyate" — "one whose doshas are in balance, whose digestive fire is balanced, whose tissues and wastes function normally, and whose self, senses, and mind are content — is called healthy." Health is not merely the absence of disease but the presence of balance, function, and contentment simultaneously. The tradition is rooted in the Atharva Veda (c. 1200 BCE), which contains hymns for healing and the earliest pharmacological observations. The great ṛṣis who compiled Āyurveda are said to have received the knowledge through the lineage: Brahmā → Dakṣa Prajāpati → Indra → Punarvasu Ātreya (Charaka's teacher) → Agniveśa → Charaka. This lineage is not merely mythological — it encodes the transmission of accumulated medical observation across many generations.