Regular periods of keeping still are an important aspect of personal development and forward motion. The most restful person may not be the one who sleeps twelve hours a day, but the one able to grab catnaps while cruising at 500 miles-per-hour at 35,000 feet. Learning to act when it is time to act, and to keep still when it is time to keep still, is the key to obtaining the peace of mind which helps one stay focused when clear focus is needed.
Consider the spine, which serves as a switchboard for all the nerves of the body that mediate movement. When the spine is kept flexible and healthy through proper rest and relaxation, active movement can always be undertaken without strain. When the spine is held erect in a balanced sitting posture, the inner balancing of meditation can take place.
Treat your innate spark of vitality as if it were a candle in the wind — protecting it as though it were your only light in a dark forest on a moonless night. Avoid external conditions that threaten to snuff out the flame, and be careful not to suffocate it with your own ambitions and worries.
Time out. Relax, take your shoes off, and sit a spell. Let go of thinking. Meditate.