Full context:   The Mahāyāna texts are inconsistent in their discussion of the pāramitās, and some texts include lists of two, others four, six, ten and fifty-two. The six paramitas have been most studied, and these are: In Mahāyāna Sutras that include ten pāramitā, the additional four perfections are "skillful means, vow, power and knowledge". The most discussed pāramitā and the highest rated perfection in Mahayana texts is the "Prajna-paramita", or the "perfection of insight". This insight in the Mahāyāna tradition, states Shōhei Ichimura, has been the "insight of non-duality or the absence of reality in all things".