In the same way, take a case where a certain individual looks just the same as other good-natured mendicants when going out and coming back, when looking ahead and aside, when bending and extending the limbs, and when bearing the outer robe, bowl and robes. That is, so long as the mendicants don’t notice his offense. But when the mendicants notice the offense, they know that he’s a corrupt ascetic, just useless trash. When they realize this they send him away. Why is that? So that he doesn’t corrupt good-natured mendicants.

Suppose that a large heap of grain is being winnowed. The grains that are firm and solid form a heap on one side. And the grains that are flimsy and insubstantial are blown over to the other side. The owners take a broom and sweep them even further away. Why is that? So that it doesn’t spoil the good grain. In the same way, take a case where a certain individual looks just the same as other good-natured mendicants when going out and coming back, when looking ahead and aside, when bending and extending the limbs, and when bearing the outer robe, bowl and robes. That is, so long as the mendicants don’t notice his offense. But when the mendicants notice the offense, they know that he’s a corrupt ascetic, just useless trash. When they realize this they send him away. Why is that? So that he doesn’t corrupt good-natured mendicants.