|On the left: Kept in the kitchen. On the right: Kept in a chilly room.|
It's counter-intuitive that warmth would lead to legginess and no blooms at all, and that chilly leads to continued blooming. It's almost as though too much pleasantness leads to a "lazy" plant. Resilience comes from a seemingly difficult climate.
This conforms to my experience. My siblings and i have a high level of resilience, perhaps partly due to a slightly chilly upbringing. Children who are accustomed to having everything provided for them lose their vigor. Uber-protection can lead to a lack of resilience.
Resilience is a key factor in happiness--happiness despite outer conditions.