一切眞言心

Từ Điển Thuật Ngữ Phật Học Hán Ngữ

The first Sanskrit letter ‘a‘; it is pronounced ‘an’ by the Shingon School and emphasized as the heart of all wisdom. In India ‘a‘ is the ‘name of Vishṇu (especially as the first of the three sounds in the sacred syllable oṃ or aum), also of Brahmā, Śiva, and Vaiśvānara (Agni)’ M. W.