Suppose there was a chicken with eight or ten or twelve eggs. And she properly sat on them to keep them warm and incubated. Even if that chicken doesn’t wish: ‘If only my chicks could break out of the eggshell with their claws and beak and hatch safely!’ Still they can break out and hatch safely. Why is that? Because she properly sat on them to keep them warm and incubated.

In the same way, when a mendicant is committed to development, they might not wish: ‘If only my mind were freed from the defilements by not grasping!’ Even so, their mind is freed from defilements by not grasping. Why is that? You should say: ‘It’s because they are developed.’ Developed in what? The four kinds of mindfulness meditation, the four right efforts, the four bases of psychic power, the five faculties, the five powers, the seven awakening factors, and the noble eightfold path.

Suppose a mason or their apprentice sees the marks of his fingers and thumb on the handle of his adze. They don’t know how much of the handle was worn away today, how much yesterday, and how much previously. They just know what has been worn away. In the same way, when a mendicant is committed to development, they don’t know how much of the defilements were worn away today, how much yesterday, and how much previously. They just know what has been worn away.