Dear Bhante Sujato,

Thank you very much for the Chinese version.

I consider Samudaya sutta of Satipatthana Samyutta quite illuminating,
since in emphasizes the central role of attention as a prerequisite of
the mental qualities. The details of this relation are described in
Ahara sutta
http://www.accesstoinsight.org/canon/sutta/samyutta/sn46-051.html
Aññatitthiyasutta (AN 1.199) and others.

Somehow this aspect of Satipatthana is rarely brought to the light.
Attention acts as a kind of mental qualities amplifier.

Best wishes,
Dimitry