Symbolism, Imagery, Allegory
A peaceful smile is an important symbol of spiritual awakening in Siddhartha. All the characters who have achieved enlightenment smile prominently and deeply. For instance, Gotama’s broad, peaceful smile allows Siddhartha to identify him in a large crowd. Vasudeva, the second character that reaches enlightenment in Siddhartha, similarly displays a notable smile that radiates understanding and peace. When Siddhartha himself attains enlightenment, he adopts a deep smile.