『マハーマーヤー・タントラ』所説の「ビンドゥ・ヨーガ」――ラトナーカラシャーンティの解釈を中心に――

抄録

Bindu （drop） yoga described by the Mahāmāyā-tantra （abbr. MMT） is practiced alongside “contemplation of akṣarapaṅkti （garland of syllables）.” According to the Guṇavatī （abbr. Gu） by Ratnākaraśānti, a commentary on the MMT, this yoga is a type of sūkṣmayoga （subtle yoga）, described in both the Guhyasamāja-tantra and the Vajrāmṛta-tantra （abbr. VAT）, and the present author has previously noted its resemblance to the latter text.

Considering that the Gu and the Mahāmāyāsādhana correspond to Sādhanamālā No. 239, have some similar parallel passages, and quote the same verse of the Samāyoga-uttarottaratantra, we can conclude that both texts were written by the same person, namely Ratnākaraśānti. The interpretations of the vijñaptimātratā （mind-only） theory are deeper in the Gu. Ratnākaraśānti’s interpretation of bindu as “mind” is unique to the Gu. This interpretation of bindu as identical with “mind” is synonymous with the phrase “a subtle form of the sign of knowledge （sūkṣmajñānamudrākāra） of Vajradhara.” This interpretation is connected with the sūkṣmayoga described in the VAT. Bindu yoga is simply a practice to strengthen the mind by means of mentally concentrating on bindu only.