"The Gateless Barrier" (Ch., Wumenguan; Jp., Mumonkan) is a thirteenth-century work that offers forty-eight entryways to wake up to your life. Each file is a remastered audio commentary on each case by Guo Gu, recorded from 2010 - 2014. Simplified versions of the talk has been edited into Guo Gu's book, "Passing Through the Gateless Barrier: Koan Practice for Real Life" (2016).