The Long Āgama Sūtra 7.45

7.45

迦葉言：「諸有智者，以譬喻得解，我今更當為汝引喻。譬如有人，從生而盲，不識五色，青、黃、赤、白，麤、細、長、短，亦不見日、月、星象、丘陵、溝壑。有人問言：『青、黃、赤、白五色云何？』盲人答曰：『無有五色。』如是麤、細、長、短、日、月、星象、山陵、溝壑，皆言無有。云何？婆羅門！彼盲人言，是正答不？」

Kāśyapa said, “Those who are wise explain things with parables. Now, I’ll explain this for you with a story. Once, there was a person who was blind from birth. They didn’t know the five colors, such as blue, yellow, red, and white, or coarse, fine, long, and short. They hadn’t seen the sun, moon, stars, hills, or valleys. Someone asked them, ‘What are the five colors, such as blue, yellow, red, and white?’

“The blind person answered, ‘There are no five colors.’ It was the same with coarse, fine, long, and short or the moon, sun, stars, hills, and valleys. The blind person said they didn’t exist. How is it, priest? Did that blind person answer correctly?”