SPOCK: Doctor, even I, a half-Vulcan, could hear the death scream of four hundred Vulcan minds crying out over the distance between us.
MCCOY: Not even a Vulcan could feel a starship die.

SPOCK: Call it a deep understanding of the way things happen to Vulcans, but I know not a person, not even the computers on board the Intrepid, knew what was killing them...

MCCOY: But four hundred Vulcans?
SPOCK: I've noticed that about your people, Doctor. You find it easier to understand the death of one than the death of a million.