“But at what point, sir, does the fervent mortification in disgust of sin reach the peak and the pith? Please help me reach the peak and the pith!” “Nigrodha, take a mortifier who is restrained in the fourfold constraint. And how is a mortifier restrained in the fourfold constraint? It’s when a mortifier doesn’t kill living creatures, doesn’t get others to kill, and doesn’t approve of killing. They don’t steal, get others to steal, or approve of stealing. They don’t lie, get others to lie, or approve of lying. They don’t expect rewards from their practice, they don’t lead others to expect rewards, and they don’t approve of expecting rewards. That’s how a mortifier is restrained in the fourfold constraint.