In Interstellar, Professor Brand keeps repeating a poem by Dylan Thomas:
Do not go gentle into that good night,
Old age should burn and rave at close of day;
Rage, rage against the dying of the light.
Though wise men at their end know dark is right,
Because their words had forked no lightning they
Do not go gentle into that good night.
(usually just the first 3 lines)
Is there any significance to it? Why does the Professor (usually) end his discussions this way?
These were his final words as well.