"I shall purify all my bodily
And my verbal forms of activity.
My mental activities, too, I shall purify
And do nothing that is non-virtuous."
Here again the aspiring bodhisattva vows to only engage in virtuous conduct. In addition to the reason given earlier, a bodhisattva needs to avoid non-virtue so that they will not fall into the lower realms, which would prevent further spiritual progress.