FLOURISH HYPOTHESIS

To flourish is to live optimally and to experience the good things in life such as personal growth, generativity and resilience.
The ratio of positive to negative affect is a key predictor of human flourishing.
The ratio is 2.9:1
For each negative affect experience, one mush have 3 positive affect experiences over the course of time to keep moving forward in life.  Researchers in this area claims that the ratio is real for the individuals, marriages and business teams.
Positive to negative affect ratio up to 11.6:1 will promot flourishing.  Ratios beyond 11.6:1 may lead to disintegration of flourishing.

RESILIENCE HYPOTHESIS

Positive emotions through their broadening effects, trigger upward spirals of well being.  "Upward spirals" are the conceptual opposite of the common notion of "downward spirals" of depression. Positive emotion, here, removes the tunnel vision, allowing the individual to see more possibilities. Hence, they can cope better and be resilient.
Researches indicated that individuals with resilience had the positive feelings, such as gratitude and optimism, as they could find goodness in the people who were helping, even in the midst of terrible miseries.

THE UNDOING HYPOTHESIS

Positive emotions have the potential to undo hanging on negative emotions.  Undoing effect occurs both at the cognitive level as well as at the psychological level.
In an experiment done by Frederickson et al (2000), among a sample of US participants, after exposing to an anticipated fear evoking situation, it was identified that watching positive emotion videos had been more effective in reducing the previously enhanced cardiovascular responses faster than watching negative emotion videos and neutral videos.