The three answers have three differents meanings to the concept of sleep:
89.30: Ra talks about the people not awake to the spiritual reality.
The second answer: Ra talks probably about some altered state of awareness and meditation acquired in the pyramids.
21.9: Ra talks that third density is where the spiritual reality is forgotten due the veil. This is a metaphorical "sleep" because 3D is the only density with the forgetting.
89.30: Ra talks about the people not awake to the spiritual reality.
The second answer: Ra talks probably about some altered state of awareness and meditation acquired in the pyramids.
21.9: Ra talks that third density is where the spiritual reality is forgotten due the veil. This is a metaphorical "sleep" because 3D is the only density with the forgetting.