Behold the turtle. He makes progress only when he sticks his neck out.
Source: In Pearls of Wisdom, ed. J. Agel and W. Glanze, 1987.
-- James B Conant, (Mar 26 1893-1978), US university administrator, diplomat; He was president of Harvard University, 1933-53; ambassador to W. Germanry, 1955-57; wrote on secondary education.