You always say I'll quit when I start to slide, and then one morning you wake up and realize you've done slid.
Source: On his retirement at age 42, Dec. 1965.
-- Sugar Ray Robinson, (May 3 1920-1989), US boxer; He was noted for his boxing brains and brawn; welterweight champ, 1946-51 and five times middleweight champ, 1951-60.