Complex sentence: According to Bronkhorst, "dhyana" concepts developed before Buddha, and the mainstream concept, namely suppression of all mental activities, developed and is evidenced in Jaina and Hindu texts in pre-Buddhist period.
Split into simpler sentences: According to Bronkhorst, "dhyana" concepts developed in pre-Buddhistic times. The mainstream concept, namely suppression of all mental activities, developed and is evidenced in Jaina and Hindu texts in pre-Buddhist period.