学然后知不足

1. • to learn is to know one's ignorance (the Book of Rites 礼记 lǐjì)

Character by character

• 学(xué)learn
• 然(rán)correct
• 后(hòu)surname Hou
• 知(zhī)know
• 不(bù)no
• 足(zú)foot