"At some point, a theistic coup d’état has eclipsed the godless schools of thought and written them out of the record. The Gītā is a blatant instance, with Krishna imposing his presence as object of devotion on chapters named after (and giving an otherwise fair summary of) godless philosophies like Sānkhya.... The Gita is [in Prof. Kedar Nath Mishra's words] a “hodge-podge” of all the then-thriving schools of Hindu philosophy, given a veneer of “synthesis” by having them all gathered under a single umbrella of Krishna devotion... The Gita’s role in Hindu tradition is to incorporate diverse schools of thought, including Sankhya atheism, into an overarching theistic and devotional worldview."
January 1, 1970
https://en.wikiquote.org/wiki/Bhagavad_Gita