‘This is the observation of an aspect of principles.’ … ‘This observation of an aspect of principles should be developed.’ … ‘This observation of an aspect of principles has been developed.’ Such was the vision, knowledge, wisdom, realization, and light that arose in me regarding teachings not learned before from another.”

Linked Discourses 47.32 4. Not Learned From Anyone Else Fading Away

“Mendicants, these four kinds of mindfulness meditation, when developed and cultivated, lead solely to disillusionment, dispassion, cessation, peace, insight, awakening, and extinguishment.

What four? It’s when a mendicant meditates by observing an aspect of the body—keen, aware, and mindful, rid of covetousness and displeasure for the world. They meditate observing an aspect of feelings … mind … principles—keen, aware, and mindful, rid of covetousness and displeasure for the world. These four kinds of mindfulness meditation, when developed and cultivated, lead solely to disillusionment, dispassion, cessation, peace, insight, awakening, and extinguishment.”

Linked Discourses 47.33 4. Not Learned From Anyone Else Missed Out

“Mendicants, whoever has missed out on the four kinds of mindfulness meditation has missed out on the noble path to the complete ending of suffering. Whoever has undertaken the four kinds of mindfulness meditation has undertaken the noble path to the complete ending of suffering.