Mental health

Resilience. Being able to deal with the plot twists that life throws your way without bigger-than-usual disruptions to mood, sleep, and ability to get things done. Ability to acknowledge, communicate about, and manage one's own emotions for minimal negative impact on life.

Dedication and hard work, it is impossible to achieve happiness as a person who is both out of shape and is does not sharpen their knowledge skills. People are like fishes in a pond not meant to be inside a fish tank, we get around.