Vaisesika is one of the six philosophical schools of thought that defended itself with intellectual fervor. They are together called as upangas of Veda. These six system of thought were in existence for a period much before it was codified. It was very much part of Vedic lore from time immemorial. Dr Radhakrishanan was of the opinion that the six conservative school were compelled codify their view and set forth logical defense of them because of the onslaught of skepticism prevalent in Buddhism.

The Vaisesika Darsana was founded by Kanada, also known as Uluka. The basic text is the Vaiseska Sutras of Kanada It has 374 sutras divided into ten chapters. To Vaiseshika system, the substances and the imperceptible souls are solid facts with atoms (anu) or true individuality behind it. Anu are universal, non perceivable and cannot be created or destroyed. The tryanu (triads) made of anu are perceivable and which is the building block of matter.

Vaiseshika system consider only Pratyakṣa (perception), Anumaṇa (inference) as the means to achieve knowledge. The Vaisesika School of philosophy recognizes seven padarthas or categories of realities. The seven categories are: 1. dravya(substance); 2. guna(quality); 3. karma(action); 4. samanya (generality); 5. visesa (particularity); 6. samavaya(relation of inherence), and 7. abhava(non-existence).The approach is more scientific than speculative and subject discussed is a mixture of physics and metaphysics. Vaisesika Darsana have harmonized the atomic theory with the moral and spiritual outlook on life and accepting God as the creator and moral governor of the world.

The distinguishing feature of Nyaya and Vaiseshika school of thought is that they employs all its resources of reasoning to argue against the doctrine of the Bhuddhists, the Sankhyas and the Carvakas to establish the causality of supreme truth as Iswara.