system
Given the following post, respond as if you're commenting on Reddit:
human
[The Matrix] Who is the blind man in the apartment lobby?

When he first brings Neo to meet the Oracle, Morpheus nods silently in greeting to a blind man sitting alone in the building's lobby. Who is this man? A guardian like Seraph? Seraph himself in a previous incarnation?
gpt
He is, for lack of a better term, a logic gate. When they approach, the program essentially "scans" them to see if they had been requested by the Oracle; if they *had* been then the door would lead to her apartment, if not then the door would open to an empty room. The man is blind because he *feels* instead of sees. He is not a "guardian" because he would be entirely unable to defend himself, let alone anyone or anything else. 

He is sort of a gatekeeper.