[545] Therein, which is the awakening factor of mindfulness (satisambojjhaṅga)?
There is mindfulness (sati) regarding internal dhammas; there is mindfulness regarding external dhammas. Whatever mindfulness regarding internal dhammas there is, that too is the awakening factor of mindfulness; it leads to direct knowledge (abhiññā), to full awakening (sambodha), to Nibbāna. Whatever mindfulness regarding external dhammas there is, that too is the awakening factor of mindfulness; it leads to direct knowledge, to full awakening, to Nibbāna.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.