What we believe about aging influences how we age. If we doubt this, there are numerous scientific works proving the role of belief in aging, including Ellen J. Langer’s Counterclockwise, and Bruce Lipton’s The Biology of Belief. Both books offer convincing evidence about the pivotal role our beliefs have on the way we age, develop illness, recover from illness, and live life as glass-half-full or glass-half-empty people. Once we become convinced that our beliefs influence our lives we understand that to live with greater energy and joy, we simply need to shift our beliefs about our bodies and our world. However, we quickly learn our beliefs are often resistant to change.