Everyer particle of reality is called a darma. Morality or ethics, holds society, civilization together and gives personal integrity. The sentient being a is what holds this body, mind together,. That's why we have this life of our own. And ultimately, it is atman which holds everything together - because it is the reality of all things.
Swami Sarvapriyananda teaches the Katha Upanishad, which is one of the most popular Upanishads. The scripture concerns the story of a young man who goes to the house of death to find out what happens after death. The reply describes the nature of reality and the meaning of life.