Mabja's Ornament of Reason is considered to be one of the greatest Tibetan commentaries on N?g?rjuna's crucial work, Root of the Middle Way. The teaching revolves around the two truths - conventional and ultimate reality. This is alternatively explained as dependent origination empty of all mental constructions of ultimate truth, along with the results of realization. Both N?g?rjuna's text and Mabja's commentary are included here.