Tony Scwartz spoke at the Google headquarters in Mountain View, Californiaon 4/17/2008 as part of the [email protected] speaker series. Tony Schwartz is the founder and president of The Energy Project http://www.theenergyproject.com/home.html. He is the co-author of "The Power of Full Engagement", which has been translated into 24 languages. Tony has written three other books, including What Really Matters: Searching for Wisdom in America. His most recent article, "The Science of Stamina," was published in the October 2007 issue of the Harvard Business Review. Demand is relentlessly rising. Our capacity is not keeping pace. The traditional solution to higher demand has been to invest more time. Unfortunately, time is finite, and most of us have no hours left to invest. Energy, however, can be systematically expanded --- and it can also be regularly renewed. To operate at our best, we need four energy sources: physical (quantity), emotional (quality), mental (focus), and the energy of the human spirit (purpose). This talk will focus on the role of energy in fueling sustainable high performance, and in motivating others.