single mind　一心 In the Smaller Sutra we find a phrase, “hold steadfast to the Name single-heartedly, . . .” (We have rendered this state of mind as “single mind”.) Vasubandhu professes his personal commitment to Amida Buddha in his Treatise on the Pure Land, “Single-heartedly I take refuge in the Tathagata of unhindered light filling the ten quarters. . . .” These are the sources of the notion of issin. Shinran equates it to the “threefold mind” of the Eighteenth Vow of the Larger Sutra and the “three minds” expounded in the Contemplation Sutra in its implicit sense; that is, it is nothing other than the “entrusting heart” as the true cause for birth in the Pure Land. When it is used in such adverbial forms as “single-mindedly”, “single-heartedly”, or “with singleness of heart”, they necessarily point to the “entrusting heart” which arises from Amida’s heart to save all sentient beings.