YOU SAID:

if you don't reflect on your mistakes in the past you'll reflect on your mistakes in the future

INTO JAPANESE

過去の間違いを振り返らないなら、将来の間違いを振り返る

BACK INTO ENGLISH

If you don't look back on past mistakes, look back on future mistakes

INTO JAPANESE

過去の間違いを振り返らない場合は、将来の間違いを振り返る

BACK INTO ENGLISH

If you don't look back on past mistakes, look back on future mistakes