YOU SAID:
I can eat glass and it does not hurt me
INTO JAPANESE
私はガラスを食べることができ、それは私を傷つけません
BACK INTO ENGLISH
I can eat glass and it won't hurt me
INTO JAPANESE
私はガラスを食べることができ、それは私を傷つけることはありません
BACK INTO ENGLISH
I can eat glass and it won't hurt me
That didn't even make that much sense in English.