Who Not a Valid Question
SN 12.12 Phagguna Sutta: To Phagguna
At Savatthi the Buddha says “Monks, there are these four nutriments for the maintenance of beings who have come into being or for the support of those in search of a place to be born. Which four? Physical food, gross or refined; contact as the second; intellectual intention the third; and consciousness the fourth."
The Venerable Phagguna asks “Who feeds on the consciousness-nutriment?”
“Not a valid question,” the Blessed One said. “I don’t say ‘feeds.’ If I were to say ‘feeds,’ then ‘Who feeds on the consciousness-nutriment?’ would be a valid question. But I don’t say that. When I don’t say that, the valid question is ‘Consciousness-nutriment for what?’ And the valid answer is, ‘Consciousness-nutriment for the production of future coming-into-being. When that has come into being and exists, then the six sense media. From the six sense media as a requisite condition comes contact.’”