大毘盧遮那成佛經疏 2.61

2.61

第卅二「歌詠心」，梵本缺文，不釋。阿闍梨言：「此喻傳法音也。如世人度曲於他，得善巧已，復為他人奏之，出種種美妙之音，聞者歡喜。此心欲從他聽聞正法，我當轉為眾生以種種文句莊嚴分別演說，令此妙音處處聞知也。」多是聲聞宿習，亦能障淨心也。當念我當得內證自然之慧，然後普現色身而演說之，是彼對治。

The thirty-second, the "singing mind," lacks text in the Sanskrit manuscript and is not explained [in the root text]. The ācārya said: "This is an analogy for transmitting the sound of the Dharma. It is like an ordinary person learning a tune from someone else; once skilled, they play it for others, producing various sweet and melodious sounds that delight those who hear it. This mind desires to hear the true Dharma from others, thinking: 'I shall in turn expound it for sentient beings, adorning and distinguishing it with various phrases, so that this wondrous sound is heard everywhere.'" This mostly stems from past habituation as a śrāvaka and can also obstruct the pure mind. Reflecting: "I shall attain the innate wisdom of inner realization, and only then universally manifest rūpakāyas to expound it," serves as its antidote.