Milk Glass Eagle Pedestal Mugs Set of 4 John Denver Song Lyrics

A set of four circa 1970s milk glass pedestal mugs, decorated on the fronts with a stylized American Eagle and the words Power Courage Freedom. Oddly enough, the backs of the mugs have four different inspirational thoughts which make up the majority of the lyrics to the John Denver song "The Eagle and The Hawk". I have no idea what the mugs might have been made to represent or commemorate. They're 5-1/2 inches tall and in excellent condition.