* In a religious context: In Hinduism, Brahman is the ultimate reality.
* In a philosophical context: The concept of Brahman explores the nature of ultimate reality.
* In a comparative religion context: Comparing Brahman to the Christian concept of God reveals interesting similarities and differences.
* In a descriptive context: The teachings centered on the realization of Brahman.
The best sentence will depend on the specific point you're trying to make.