Recent studies are showing that taking time for silence restores the nervous system, helps sustain energy, and conditions our minds to be more adaptive and responsive to the complex environments in which so many of us now live, work, and lead. Duke Medical School's Imke Kirste recently found that silence is associated with the development of new cells in the hippocampus, the key brain region associated with learning and memory. Physician Luciano Bernardi found that two-minutes of silence inserted between musical pieces proved more stabilizing to cardiovascular and respiratory systems than even the music categorized as "relaxing."

And a 2013 study in the Journal of Environmental Psychology, based on a survey of 43,000 workers, concluded that the disadvantages of noise and distraction associated with open office plans outweighed anticipated, but still unproven, benefits like increasing morale and productivity boosts from unplanned interactions.

Possible Preaching Angles: These physical benefits are impressive, but for Christians there is even a deeper reason for the spiritual discipline of silence—it connects us with God.