Especially a language such as Chinese, which is EXPLICITLY tonal, and failure to know these tones will cause you to say things meaning something completely different than you intended.
This cannot be conveyed properly in a book. I've tried.
The weakest of all weak things is a virtue that has not been tested in the fire.
~ Mark Twain
Everyone has a plan until they’ve been hit.
~ Joe Lewis
A warrior may choose pacifism; others are condemned to it.
~ Author unknown
"You don't feel lonely.Because you have a lively monkey"
"Ninja can HURT the Spartan, but the Spartan can KILL the Ninja"