In the novel, the three Cleary women are thorn birds, because they pursue their love at great cost and pain。 The thorn bird is a kind of inpidual who suffers a lot to get the love and happiness。 In human life, the two ends are misery and happiness, and the source of great happiness is the great pain。 As a true man, he should face misery bravely, put the longest and sharpest thorn in his breast, and gain great happiness with great pain。