If this is coffee, please bring me some tea; but if this is tea, please bring me some coffee.
Source: In 1,911 Best Things Anybody Ever Said, ed. Robert Byrne, 1988.
-- Abraham Lincoln, (Feb 12 1809-1865), US president, lawyer; He was the 16th U.S. president during the Civil War; wrote Emancipation Proclamation, and Gettysburg Address, 1863.