In Season 5 of "Criminal Minds," the opening and closing quotes (bookend quotes) that include the word "love" are:
Opening Quote (Season 5, Episode 1, "Faceless"): “Love is not love that alters when it alteration finds.” - William Shakespeare
Closing Quote (Season 5, Episode 22, "Devil's Night"): “Love can be a powerful influence. It can be the very thing that brings a person to their knees.” - Unknown
These quotes help to encapsulate the themes of love and its complexities throughout the season. Let me know if you need more information!