首楞嚴義疏注經 8.128

8.128

一切種智自利、利他相用顯現，名為容貌。無緣慈悲，名之為心。故《觀經》云「佛心者大慈悲是。」此菩薩分得其用，名之為同。

The manifestations and functions of the knowledge of all modes for self-benefit and benefiting others are called the 'appearance.' Conditionless compassion is called the 'mind.' Thus the Contemplation Sūtra says: 'The Buddha's mind is great compassion.' This bodhisattva partially obtains its function; hence it is called 'identical.'