My mistake incurred his anger.

Excuse me; allow me to point out three errors in the above article.

However the protagonist is aware of his own mistakes.

In Japan it's generally thought that Germany's water supply isn't suitable for drinking, but this is a mistake.

Your composition is correct, as far as grammar is concerned.

She made the same mistake again.

She pointed out my mistake.

She insisted that it was my fault.

She pointed out the mistakes I had made.

She made a lot of spelling mistakes.