YOU SAID:

He learned the hardest lesson of his life and had the scars, both physical and mental, to prove it.

INTO JAPANESE

彼は人生で最も難しい教訓を学び、それを証明するために肉体的にも精神的にも傷を負いました。

BACK INTO ENGLISH

He learned the most difficult lesson in his life and was physically and mentally injured to prove it.

INTO JAPANESE

彼は人生で最も難しい教訓を学び、それを証明するために肉体的および精神的に怪我をしました。

BACK INTO ENGLISH

He learned the most difficult lesson in his life and was physically and mentally injured to prove it.