[316] Bhikkhus, suppose on level ground, at a crossroads of four great highways, there stood a chariot harnessed to thoroughbreds, with the goad set in place between the two [horses]. A skilled trainer, a charioteer-tamer of horses to be tamed, having mounted it, taking the reins in his left hand and the goad in his right hand, might drive it wherever he wishes, whenever he wishes. Even so, bhikkhus, when anyone has developed and made much of mindfulness directed to the body (kāyagatāsati), then to whatever state realizable by direct knowledge (abhiññā) he inclines the mind (citta) for its realization by direct knowledge, in each and every case he attains the capability of witnessing it, there being a [suitable] basis.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.