[516] Therein, what is investigation (vīmaṃsā)?
That which is wisdom (paññā), the act of understanding, … non-delusion (amoha), investigation of dhammas (dhammavicaya), right view (sammādiṭṭhi) — this is called investigation.
Therein, what is concentration (samādhi)?
That which is stability of the mind (citta), … right concentration (sammāsamādhi) — this is called concentration.
Therein, what is the volitional formation of striving (padhānasaṅkhāra)?
That which is the mental arousing of energy (viriyārambha), … right effort (sammāvāyāma) — this is called the volitional formation of striving.
Thus he is furnished, … endowed with this investigation, this concentration, and this volitional formation of striving. Therefore it is said: "endowed with investigation, concentration, and the volitional formation of striving" (vīmaṃsāsamādhipadhānasaṅkhārasamannāgato).
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.