(1)《論語·公冶長》：“季文子三思而后行。子聞之，曰：‘再，斯可矣。’”(2)《孔子家語·三恕》：“故君子少思其長則務學，老思其死則務教，有思其窮則務施。”(3)Thinktwicebeforeyoudo.(4)Thinkfirst,thenact.(5)Lookbeforeyouleap.