YOU SAID:
the price of liberty is eternal vigilance, but the price of eternal vigilance is insanity.
INTO JAPANESE
自由の価格は永遠の警戒であるが、永遠の警戒の価格は狂気である。
BACK INTO ENGLISH
The price of freedom is eternal vigilance, but the price of eternal vigilance is crazy.
INTO JAPANESE
自由の代価は永遠の警戒であるが、永遠の警戒の代償は狂っている。
BACK INTO ENGLISH
The price of freedom is eternal vigilance, but the price of eternal vigilance is crazy.
That didn't even make that much sense in English.