A Lesson From Amoebas

"Researchers at the University of California at Berkeley did an experiment sometime ago that involved introducing an amoeba into a perfectly stress-free environment. Ideal temperature, optimal concentration of moisture, constant food supply- the amoeba had an environment to which it had to make no adjustment whatsoever. So you would guess that that was one happy little amoeba. Yet, oddly enough, it died. Apparently there is something about all living creatures, even amoebas, that demands challenge. Comfort alone will kill us. "
John Ortberg