YOU SAID:

To do is not to be undone without first doing.

INTO JAPANESE

行うことは、最初に行うことなく元に戻されないことです。

BACK INTO ENGLISH

What you do is that you can't go back without doing it first.

INTO JAPANESE

あなたがすることは、あなたが最初にそれをしないと戻れないということです。

BACK INTO ENGLISH

What you do is that you can't go back without doing it first.