Helen Keller? Alexander Graham Bell? Johann P. F. Richter? Miguel de Cervantes? Anonymous? Dear Quote Investigator: A venerable adage emphasizes the desirability of retaining a positive outlook and flexibility. Plans always encounter difficulties, and a successful person must be able to adapt. Here are two instances of a proverb that employs doorways figuratively: When one … Continue reading When One Door Closes Another Opens, But Often We Look So Long Upon the Closed Door That We Do Not See the Open Door