This paper explores how the interpersonal meaning of power is realized by the lexico-grammatical patterns,taking one episode from the novel The Thorn Birds as examples.The analytical framework is drawn from systemic functional grammar.The findings suggest that as a type of interpersonal meaning,power could be realized by non-reciprocal language patterns.The finding is meant to deepen our understanding of the relation between the meaning of text and the lexico-grammatical patterns that function to realize that meaning.