YOU SAID:

One must be in peace with himself to be in peace with the world

INTO JAPANESE

世界と平和になるためには、自分自身と平和にならなければなりません。

BACK INTO ENGLISH

To be peaceful with the world you must be peaceful with yourself.

INTO JAPANESE

世界と平和になるためには、自分と平和でなければなりません。

BACK INTO ENGLISH

To be in peace with the world, you must be in peace with yourself.

INTO JAPANESE

世界と平和になるためには、あなたは自分と平和にならなければなりません。

BACK INTO ENGLISH

To be in peace with the world, you must be in peace with yourself.