The Brahma Net Sutra belongs to the same period as theAvatamsaka Sutra, the first teaching period of the Buddha, immediately following his Enlightenment. It is part of the Sudden Teaching preached to Bodhisattvas and other advanced beings while He was in samadhi. T'ien-t'ai Patriarch Chih-i called the Brahma Net "the capping text of the Avatamsaka Sutra" .
A. Mind / Mind-Ground
C. The Precepts