请在横线上举出两个典型事例说明“由此可见”后面的观点。要求：语言具有说服力，句式要匀整。不超过100字。
                                                                            
                                                                              
                                                                           
                                                                          
        由此可见，要提高文章境界，必须提高思想境界，心如日月，文方有日月之光。