Rewatching Star Trek (The Original Series, 1966-1969)

Bonus! Episode o' the Day
"This Side of Paradise" (season one, episode twenty-four; production code: 025; 2 March 1967): Wikipedia-link.

Commentary: The Enterprise encounters a group of human colonists who should be dead but aren't, who are thriving despite being bathed by mysterious but deadly Berthold rays. The colonists on Omicron Ceti III are being kept alive by alien spores of unknown origin that thrive on Berthold rays. The spores also have the effect of creating a sense of euphoria & belonging (much like Landru's telepathic control in "The Return of the Archons") that lead to apathy. To understand why Captain Kirk puts an end to all of this lollygagging, I'll simply quote "The Strenous Life" by Theodore Roosevelt:

I wish to preach, not the doctrine of ignoble ease, but the doctrine of the strenuous life, the life of toil and effort, of labor and strife; to preach that highest form of success which comes, not to the man who desires mere easy peace, but to the man who does not shrink from danger, from hardship, or from bitter toil, and who out of these wins the splendid ultimate triumph.

Once freed from the influence of the spores, the colonists on Omicron Ceti III are disappointed at how little they have accomplished in three years on the planet & agree to be removed, presumably to begin again somewhere else.