Vaisesika is an ancient Indian philosophy that focuses on the nature of reality and the classification of objects in the universe. Founded by the sage Kanada, it emphasizes the existence of atoms and the material world, proposing that everything is made up of small, indivisible particles. This school of thought categorizes substances into different types, such as earth, water, fire, air, and ether, and explores their properties and interactions. The philosophy of Vaisesika is often associated with Nyaya, another school of Indian philosophy that deals with logic and epistemology. Together, they form a comprehensive system that seeks to understand the nature of knowledge, existence, and the relationship between the observer and the observed. Vaisesika's insights have influenced various fields, including science and metaphysics.