That is what is meant, I think by the allegation that it is good simply to be alive, even if one is undergoing terrible experiences. The situation is… - Thomas Nagel

[I]f things emerged from a spaceship which we could not be sure were machines or conscious beings, what we were wondering about would have an answer even if the things were so different from anything we were familiar with that we could never discover it. It would depend on whether there was something it was like to be them, not on whether behavioral similarities warranted our saying so. … [W]e need … to ask whether experience is present in [the] alien thing[s], … whether there is something it is like to be them, and … the answer to that question is what determines whether they are conscious.

If we tried to rely entirely on reason, and pressed it hard, our lives and beliefs would collapse — a form of madness that may actually occur if the inertial force of taking the world and life for granted is somehow lost. If we lose our grip on that, reason will not give it back to us.

Without consciousness the mind-body problem would be much less interesting. With consciousness it seems hopeless.