What are the motifs in The Adventures of Tom Sawyer by Mark Twain?

Truth and falsehood are recurring ideas in the story. The first words Tom Sawyer speaks in The Adventures of Tom Sawyer are a lie. Aunt Polly is looking for Tom and shouting his name, and when she finds him hiding in the closet and asks him what he is doing, he replies, in an obvious lie, "Nothing." She points to the jam all over his mouth and hands and asks what it is, and he replies, "I don't know, aunt," another obvious lie. Tom is thus introduced as a mischievous boy who gets into trouble, although Aunt Polly's laughter upon Tom's escape from her disapproval shows that his lies and disobedience are essentially unimportant to her.