I hear and I forget

I hear and I forget, I see and I remember, I do and I understand. 

荀子 Xun Zi 

不聞不若聞之，聞之不若見之，見之不若知之，知之不若行之；學至於行之而止矣。(pinyin: Bù wén bù ruò wén zhī, wén zhī bù ruò jiàn zhī, jiàn zhī bù ruò zhīzhī, zhīzhī bù ruò xíng zhī; xué zhìyú xíng zhī ér zhǐ yǐ.)

• Literally: I hear and I forget; I see and I remember; I do and I understand.
• Moral: You can only understand something by trying it yourself.
• Revised: Tell me and I [will] forget. Show me and I [will] remember. Involve me and I [will] understand.
• Also: You can't understand until you walk a mile in someone else's shoes.
  • Originally by Xun Zi.   
  • 荀子 儒效 二十三 (中國哲學書電子化計劃)