My first thought is that balance does not necessarily mean one of the two is negative and we need to balance it with the other. To me it may mean that one of the two requires energy while the other provides energy. Or it may mean one of the two requires massive amounts of mental energy focused into one area while the other requires small amounts of mental + physical energy distributed in several areas of activity. However, I also find the “hate Mondays - love Fridays” a little too pretentious of a social construct. Life doesn’t have to be like that.