but please be conscious of your gender use in sentences.

You used "himself" and then went to on to say she...it was confusing and I had to read it twice.

"For instance, a person who has been rejected by a love interest convinces "himself" that "she" rejected him because she did not share in his ideal of happiness (sour grapes), and also that her rejection is a blessing in disguise in that it has freed him to find a more suitable partner (sweet lemons)."

Inside quotations are mine.