[1153] Bhikkhus, if a bhikkhu, in dependence on inquiry (vīmaṃsā), obtains concentration (samādhi), obtains one-pointedness of mind (cittassa ekaggatā) — this is called concentration due to inquiry (vīmaṃsāsamādhi). He generates desire (chanda) for the non-arising of unarisen evil, unwholesome states; he makes an effort, arouses energy (vīriya), exerts his mind (citta), and strives … He generates desire for the maintenance of arisen wholesome states, for their non-forgetting, for their increase, expansion, development, and fulfillment; he makes an effort, arouses energy, exerts his mind, and strives. These are called volitional formations of striving (padhānasaṅkhārā). Thus, this inquiry, this concentration due to inquiry, and these volitional formations of striving — this, bhikkhus, is called the basis for spiritual power (iddhipāda) endowed with concentration due to inquiry and volitional formations of striving.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.