The Perfection of Energy - The four applications of mindfulness

We should reflect on the different kinds of efforts. If endeavour is only of a very slight degree, the conditions for the arising of the controlling faculty of sati are not sufficient. We read in the above-quoted sutta about the controlling faculty of sati:

“And from what point of view, monks,

should the controlling faculty of mindfulness be regarded?

From that of the four applications of mindfulness.”
Kusala citta cannot arise without sati cetasika, be it at the moment one performs dana, or abstains from akusala. However, the characteristic of the controlling faculty of sati, the characteristic of its leadership, can be seen in the four applications of mindfulness