Not exactly wanted, but the statement still held. He might have wondered why he would even sleep in Albedo's presence, but the answers were already there. At the end of all reasons, his welfare did not matter. What happened to him would steadily lose its significance; it would be best to never hold to things in the first place.

Like shifting of motives while one slept.

The thought was potent enough to seep into his waveform, and when Nigredo "spoke" again, he sounded sad. Defeated. The meaning unconsciously revealed. {Good night.} With that, he fell asleep.