You need to be in the right frame of mind to review your editor’s suggestions and changes. Sometimes, looking at the edits can make a person feel as though they are back in fifth grade and the teacher just returned a paper covered in red ink (“-1 for the missing capital letter”, “-2 for the missing comma”). Remember that you haven’t paid an editor to make you feel good about yourself. You paid an editor to point out everything that is wrong with the book. The more they caught, the better.