译文:学习贵在实践,而非空知;贵在有用于世,而非无用之学。反对空谈,提倡经世致用。
【大意】要想招引游鱼就得先通水,要想招引飞鸟就得先种树。
Science is a way of thinking much more than it is a body of knowledge.
“拙”可以使人少过错,“缓”可使人免后悔,“退”可远离灾祸,“苟”可使人养福,“静”可使人长寿。