A definite purpose, like blinders on a horse, inevitably narrows its possessor's point of view.
Robert FrostA diplomat is a man who always remembers a woman's birthday but never remembers her age.
Robert FrostTwo roads diverged in a yellow wood, And sorry I could not travel both And be one traveler, long I stood And looked down one as far as I could To where it bent in the undergrowth.
Robert Frost