釋門歸敬儀 2.82

2.82

謂此心體本清淨，究達此理，作業令淨，故曰發心，即名行也。行者如上安止心已，生大欲心：我入佛道，廣度眾生，所修善根，皆悉迴向無上正覺。故《智論》云：「若人發心言，我定當作佛，已過諸世間，應受勝供養。」

This means that the substance of this mind is fundamentally pure; thoroughly penetrating this principle and performing actions to make it pure—hence called 'arousing the mind'—is precisely called practice. When the practitioner has calmed and settled the mind as above, they give rise to a mind of great aspiration: 'I shall enter the Buddha path, broadly deliver sentient beings, and dedicate all the roots of virtue cultivated toward unsurpassed correct awakening.' Therefore the Mahāprajñāpāramitopadeśa states: 'If a person arouses the mind, saying, "I will definitely become a Buddha," they have already surpassed all worldly realms and should receive supreme offerings.'