望    岳
                                                                                                              杜甫
                                                                                            岱宗夫如何？齐鲁青末了。
                                                                                            造化钟神秀，阴阳割昏晓。
                                                                                            荡胸生曾云，决眦入归鸟。
                                                                                            会当凌绝顶，一览众山小。

                                                                                                               春  兴
                                                                                                       （唐）武元衡
                                                                                   杨柳阴阴细雨晴，残花落尽见流莺。
                                                                                   春风一夜吹乡梦，又逐春风到洛城。

雨后池上

刘攽

一雨池塘水面平，淡磨明镜照檐楹。

东风忽起垂杨舞，更作荷心万点声。

      【注】刘攽（bān），庆历六年进士，曾助司马光修《资治通鉴》。

莫笑农家腊酒浑，丰年留客足鸡豚。

山重水复疑无路，柳暗花明又一村。

箫鼓追随春社近，衣冠简朴古风存。

从今若许闲乘月，拄杖无时夜叩门。

诗句“山重水复疑无路，柳暗花明又一村。”因其蕴含哲理，历来为人称道，请作简要分析。