Every self help book written today mentions balance. It is in the lexicon of society now, that the best lives contain balance. Ups and downs, highs and lows, good and bad; a truly fulfilling life has all these elements. The downs, lows and bad do not have to be tragedies. Instead, merely, less of the ups, highs and good.
There is, also, how we respond to these lesser times that is significant. It is possible to remain in balance through any and all difficult situations. Not necessarily easy; but doable. Remembering that our lives are in a constant state of change might help. What goes down must come up again etc. . .
Being on an even keel can be safe and comfortable. That can lead to boredom. Real fun and adventure happens at the polar opposite peaks. Life is for experiencing the whole range of emotions. This does not mean one has to stay in the middle, it can also be having more ups than downs, more highs than lows and more good than bad.
Even if we have to dig deep to find the positive in situations, using balance to uplift when down can make a great difference.