Many people feel that they have too much stress in their lives. The circumstances that one person finds stressful may be exciting to another. A bridge is a stress-bearing system. By design, it handles forces placed upon it with rigidity.
Biological systems respond to stress by adapting.
When we first begin an exercise routine, our heart rate increases to handle the new workload. The same exercise routine is no longer stressful. We have the opportunity to handle the external forces in our lives in an infinite number of ways. When we forget this, we become rigid like the bridge. When we identify rigidity in ourselves, we are taking the first step towards adapting to the forces of change in our lives.