From FastCompany: That myth compels many of us to view an ideal life as a set of perfectly level scales. On the tray on one side is your personal life. On the other side is your work life. With heroic efforts, you can keep both trays exactly level. If one starts to tip too far, you make some kind of nifty move that balances them again.
In reality, that perfect balance almost never occurs, except for those rare, fleeting moments when the trays pass each other on the way up or down — and we’re too frazzled to appreciate that brief moment of self-actualization anyway.