[124] Bhikkhus, consciousness comes into being in dependence on a dyad. And how, bhikkhus, does consciousness come into being in dependence on a dyad? In dependence on the eye and forms, eye-consciousness arises. The eye is impermanent, subject to change, becoming otherwise; forms are impermanent, subject to change, becoming otherwise. Thus this dyad is unstable and tottering, impermanent, subject to change, becoming otherwise. Eye-consciousness is impermanent, subject to change, becoming otherwise. Whatever cause, whatever condition there is for the arising of eye-consciousness — that cause too, that condition too is impermanent, subject to change, becoming otherwise. When eye-consciousness has arisen in dependence on a condition that is impermanent, bhikkhus, how could it be permanent? The meeting, the encounter, the concurrence of these three things, bhikkhus — this is called eye-contact (cakkhusamphassa).
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.