“And how, Ānanda, is there the supreme development of the faculties in the training of the Noble One? When a mendicant sees a sight with their eyes, in them arises what is agreeable, what is disagreeable, and what is both agreeable and disagreeable. They understand: ‘What is agreeable, what is disagreeable, and what is both agreeable and disagreeable have arisen in me. That’s conditioned, crude, and dependently originated. But this is peaceful and sublime, namely equanimity.’ Then the agreeable, the disagreeable, and the both agreeable and disagreeable that arose in them cease, and equanimity becomes stabilized. It’s like how a person with clear eyes might open their eyes then shut them; or might shut their eyes then open them. Such is the speed, the swiftness, the ease with which anything agreeable, disagreeable, and both agreeable and disagreeable that arose in them cease, and equanimity becomes stabilized. In the training of the Noble One this is called the supreme development of the faculties regarding sights known by the eye.

Furthermore, when a mendicant hears a sound with their ears, the agreeable, the disagreeable, and the both agreeable and disagreeable arise in them. They understand: ‘What is agreeable, what is disagreeable, and what is both agreeable and disagreeable have arisen in me. That’s conditioned, crude, and dependently originated. But this is peaceful and sublime, namely equanimity.’ Then the agreeable, the disagreeable, and the both agreeable and disagreeable that arose in them cease, and equanimity becomes stabilized. It’s like how a strong person can effortlessly snap their fingers. Such is the speed, the swiftness, the ease with which anything agreeable, disagreeable, and both agreeable and disagreeable that arose in them cease, and equanimity becomes stabilized. In the training of the Noble One this is called the supreme development of the faculties regarding sounds known by the ear.