Complex sentence: The Brahma sutras consists of 555 aphoristic verses (sutras) in four chapters, and are primarily about the nature of human existence and universe, and ideas about the metaphysical concept of Ultimate Reality called Brahman.
Split into simpler sentences: The Brahma sutras consists of 555 aphoristic verses (sutras) in four chapters. These verses are primarily about the nature of human existence and universe, and ideas about the metaphysical concept of Ultimate Reality called Brahman.