Five hearts may not be based on any book.

The original text is stick to what you insist on, you are not sure, and you lose cleanly. Five hearts means "the top of your head, two palms, two full hearts", which means that no matter what you want to do, do it when you think about it, and don't hesitate, otherwise you will often miss the opportunity and eventually fail. This sentence inspires us to do it when we should, and don't waver.