大毘盧遮那成佛經疏 3.29

3.29

Regarding the sūtra saying, "One should arouse the bodhicitta": this means generating a resolute vow, single-mindedly aspiring to sarvajñajñāna, determined to universally deliver sentient beings of the dharmadhātu. This mind is like a banner, the leader of all practices; like a seed, the root of myriad virtues. If one does not arouse this mind, it is like not having entered the kalala; then what would the mahākaruṇāgarbha nurture? One could not even establish roots of goodness for oneself, how much less could one serve as a teacher of others? One should explain this profoundly and esoterically in terms of each of the bhūmis, until with Vairocana it is first called the ultimate arousing of the mind of the inexhaustible dharmadhātu.