And how does a mendicant meditate as by day, so by night; as by night, so by day? It’s when a mendicant develops the basis of psychic power that has immersion due to enthusiasm, and active effort, with the same features, attributes, and signs by day as by night. And they develop it with the same features, attributes, and signs by night as by day. That’s how a mendicant meditates as by day, so by night; as by night, so by day.

And how, with an open and unenveloped heart, does a mendicant develop a mind that’s full of radiance? It’s when a mendicant has properly grasped the perception of light, and has properly grasped the perception of day. That’s how, with an open and unenveloped heart, a mendicant develops a mind that’s full of radiance.

And what is energy that’s too lax? …