此日中流自在行“为有源头活水来”，已是耳熟能详广为引用的名句；而对出自姐妹篇中异曲同工的“此日中流自在行”的哲言，也许有的同志会颇感陌生。为了给方兴未艾的“三讲”教育鸣锣开道，重温出自宋代哲学家、理学家、教育家朱熹笔下借用感性形象阐述理性认识——劝学的哲 This day of freestyle “to source water” is already a well-known quotation which can be widely quoted; and perhaps some comrades may feel unfamiliar with the philosophical words of “similarities and differences between today and today,” which are of the same type in sisterhood. In order to unleash the booming “Three Emphases” education, reviewing from the philosopher, philosopher and educator of the Song Dynasty, Zhu Xi expounded the rational understanding of the rational image