“Udāyī, it’s when a mendicant develops the awakening factor of mindfulness, which relies on seclusion, fading away, and cessation, and ripens as letting go. And it is abundant, expansive, limitless, and free of ill will. With a mind that has developed the awakening factor of mindfulness, they penetrate and shatter the mass of greed, the mass of hate, and the mass of delusion for the first time. … A mendicant develops the awakening factor of equanimity, which relies on seclusion, fading away, and cessation, and ripens as letting go. And it is abundant, expansive, limitless, and free of ill will. With a mind that has developed the awakening factor of equanimity, they penetrate and shatter the mass of greed, the mass of hate, and the mass of delusion for the first time. This is how are the seven awakening factors are developed and cultivated so as to lead to penetration.”

Linked Discourses 46.29 3. With Udāyī One Thing

“Mendicants, I do not see a single thing that, when it is developed and cultivated like this, leads to giving up the things that tighten the fetters like the seven awakening factors. What seven? The awakening factors of mindfulness, investigation of principles, energy, rapture, tranquility, immersion, and equanimity. And how are the seven awakening factors developed and cultivated so as to lead to giving up the things that tighten the fetters?

It’s when a mendicant develops the awakening factors of mindfulness, investigation of principles, energy, rapture, tranquility, immersion, and equanimity, which rely on seclusion, fading away, and cessation, and ripen as letting go. That’s how the seven awakening factors are developed and cultivated so as to lead to giving up the things that tighten the fetters.