“Mendicants, there are four ways of practice. What four? Painful practice with slow insight, painful practice with swift insight, pleasant practice with slow insight, and pleasant practice with swift insight.

And what’s the painful practice with slow insight? It’s when a mendicant meditates observing the ugliness of the body, perceives the repulsiveness of food, perceives dissatisfaction with the whole world, observes the impermanence of all conditions, and has well established the perception of their own death. They rely on these five powers of a trainee: faith, conscience, prudence, energy, and wisdom. But these five faculties manifest in them weakly: faith, energy, mindfulness, immersion, and wisdom. Because of this, they only slowly attain the conditions for ending the defilements in the present life. This is called the painful practice with slow insight.