yathoktam "tatraiva bodhayed arthaṃ bahir yātaṃ yadīndriyam / tata etad bhavedevaṃ śarīre tatva(cca---)bodhakam //" iti tathā hyayaṃ kramaḥ
As has been said: "If the sense organ were to go outside and make the object cognizable there, then it might be so; [but] in fact it brings about cognition while [remaining] in the body." Such is this process.