The Power of the Other: The startling effect other people have on you, from the boardroom to the bedroom and beyond-and what to do about it

by Henry Cloud

if you are not challenged enough, you risk falling into what Csikszentmihalyi calls the boredom quadrant. I call it disengagement. It awaits someone used to running 2 miles who is asked to run 2 or even only 2.2. It is not enough of a challenge. Great Corner Four relationships push us upward at all times.