過ちて改めざるこれを過ちという
あやまちてあらためざるこれをあやまちという
a man who has committed a mistake and doesn't correct it is committing another mistake
過ちを改める is read as あやまちをあらためる (ayamachioaratameru) and means to correct a fault.
あやまちをあらためる
ayamachioaratameru
あやまちてあらためざるこれをあやまちという
a man who has committed a mistake and doesn't correct it is committing another mistake