Yin and yang is a Taoist moral concept.
Edward Donald Stone -LRB- born January 5 , 1937 -RRB- was an American college and professional football player .. football. American football. A halfback , Stone played college football at the University of Arkansas , and played professionally in the American Football League for the Denver Broncos from 1961 through 1964 , and then for the AFL 's Buffalo Bills and Houston Oilers .. Arkansas. Arkansas Razorbacks football. Denver Broncos. Denver Broncos. 1961 AFL season. 1964 American Football League season. Buffalo Bills. Buffalo Bills. Houston Oilers. Houston Oilers. football. American football. halfback. running back. college football. college football. University of Arkansas. Arkansas Razorbacks. American Football League. American Football League. He was an American Football League All-Star in 1961 .. 1961 AFL season. American Football League. American Football League. American Football League All-Star. American Football League All-Star games