Today's cartoon is based on the idiom Put your heart into something:
When you put your heart into something you make a lot of effort to do something.
"He's the kind of person who puts his heart into his job."
"She wanted her company to be a success and really put her heart into it."
Put your heart and soul into something is also used and has the same meaning.
"The author put his heart and soul into the writing of this book."
