Life would be cloying if we had only good memories. Who has never tasted bitter, knows not what is sweet. There are not my mistakes, it's just my life. It's not my fault that I have a very good memory to remember all my different memories. <img title="Wink" src="http://www.italki.com/Scripts/tinymce/jscripts/tiny_mce/plugins/emotions/img/smiley-wink.gif" alt="Wink" border="0" />

We do remember them. They are as important as good ones. 

It was just mistakes that's why..

Agree Marnya..Not always related to mistakes and sometimes they have bad effects forever.

Not all bad memories are linked to mistakes.