From points of departure in ordinary mentality where most of us reside, it was widely thought in Mahayana Buddhism that an initial faith is required to begin this practice of wisdom. As the Large Sutra on Perfect Wisdom defines it “Faith here means the believing in perfect wisdom, the trusting confidence, the resoluteness, the deliberation, the weighing up, the testing.” Without some faith that these practices are worthwhile, that exerting oneself in them would be a healthy engagement of time and effort, no one would or should take them up. But the sutras imagine, sensibly, that in the process of engaging in these practices, on the basis of that initial faith, what at first requires faith because it seems so foreign and unnatural later becomes a second nature, internalized on the basis of experience. At some point the practitioner “knows” something, feels something strongly, based on what has already taken place. The more deeply ingrained the practices of perfection become, the less discipline is required and the more one is able to perform a wise act spontaneously out of a profound sense of what is right under the circumstances.