The Tarka Sangraha of Annambhatta with his expository gloss on it, called Dipika, is the most popular introductory work on the Nyaya- Vaiseshika system of Indian philosophy. Sanskrit Text, word by word meanings, and commentary.
The animal has its happiness in the senses, the human beings in their intellect, and the gods in spiritual contemplation. It is only to the soul that has attained to this contemplative state that the world really becomes beautiful.
-Swami Vivekananda