大毘盧遮那成佛經疏 2.65

2.65

第卅六「云何師子心？謂修行一切無怯弱法」者，如師子於諸獸中，隨所至處皆勝，無有怯弱。此心亦爾，於一切事中皆欲令勝一切人，心不怯弱。自心謂無有難事，莫能與我觕其優劣者。若自覺知已，當發釋迦師子心，當令一切眾生遍勝，無有優劣，是所對治。

The thirty-sixth: "What is the lion mind? It is practicing the teaching of being entirely free from cowardice." Just as a lion among beasts is victorious wherever it goes and knows no fear; this mind is also like this: in all affairs it wishes to triumph over all people, and its mind is not faint-hearted. It thinks within itself that there are no difficulties and that none can vie with it in superiority. When one realizes this in oneself, one should generate the mind of the Lion of the Śākyas, resolving that all sentient beings shall be universally victorious without distinction of superior and inferior; this serves as its antidote.