Following on from David Stanfields comments about 'balance' not being a biblical term or even a spiritual concept, I came across this section written by Mike Yaconelli (page90)
"Balance is a cherised value in modern society. Balance means that there are no extremes....Balance is a condition of neutrality, where the middle is considered desirable and healthy. When someone is described as balanced it is understood as a compliment...blanced describes a person who moderates all aspects of their life, physical, mental, social and spiritual....balance sounds like a characteristic of the christian faith...
Beware of balance!
...it is silently destructive, crushing the unbalance of giftedness, taming the extremes of passion, snuffing out the raging fire of a genuine relationship with Jesus."
I suppose that fits to what it says in Revelation 3v15,
"I know your deeds, that you are neither cold nor hot, I wish you were either one of the other. SO cos you are lukewarm (balanced?) I am about to spit you out of my mouth."