This paper is a book review on How Do You Know Guanyin Is There? written by Venerable Master Hsing Yun, who is indeed a bodhisattva with unsurpassed wisdom and compassion. His discussion of Guanyin is mainly from an approach of practicality instead of a logical analysis to prove Guanyin's existence. Guanyin's existence is deep faith and nothing more. Based on faith, Venerable Master discusses the wisdom of different practices, which has enabled me as the reader to realize the profundity of Venerable Master Hsing Yun's self-cultivation and the grand accomplishments of Fo Gaung Shan, that is, to be a Guanyin yourself.