sentences:  The song has been widely recorded in a variety of different styles – folk, blues, country, bluegrass, rock – often with considerable variations and/or additions to the original verses.The lyrics of the original song convey a stoic optimism in the face of emotional setbacks, and the song has been described as a "simple, elegant distillation of the Blues".In 2018, it was selected for preservation in the National Recording Registry by the Library of Congress as being "culturally, historically, or artistically significant."