Full context:   According to Vetter and Bonkhorst, the ideas on what exactly constituted this "liberating insight" was not fixed but developed over time. According to Bronkhorst, in earliest Buddhism the four truths did not serve as a description of "liberating insight". Initially the term prajna served to denote this "liberating insight". Later on, prajna was replaced in the suttas by the "four truths". This happened in those texts where practicing the four jhanas preceded the attainment of "liberating insight", and where this practice of the four jhanas then culminates in "liberating insight". This "liberating insight" came to be defined as "insight into the four truths", which is presented as the "liberating insight" which constituted the awakening, or "enlightenment" of the Buddha. When he understood these truths he was "enlightened" and liberated,[note 33] as reflected in Majjhima Nikaya 26:42: "his taints are destroyed by his seeing with wisdom."