Prabhupāda: They, unless the seer returns back, the body will lie down. That is death. The seer no more comes back. Then it is dead.
Hṛdayānanda: Yes, sometimes a man dies in his sleep.
Prabhupāda: It is dead.
Tamāla Kṛṣṇa: So sleeping is like temporary death.
Prabhupāda: Yes. All deaths are temporary. When you change bodies, you die for seven months. This death is for few hours, and that is for seven months. That's all.
Bharadvāja: What happens when he dreams of the spiritual master or Kṛṣṇa?
Prabhupāda: That's all right. Dreaming means he's seeing. The seer is the same.