出自先秦《荀子·非相》。赠人以有益之言,比赠人以金石珠玉更显珍贵。说明有益的建言对他人事业人生的助益作用。
A book is a mirror: if an ass peers into it, you can't expect an apostle to look out.
The human heart is the most deceitful of all things, and desperately wicked. Who really knows how bad it is?