"The Greatest Love" is a song performed by Elvis Costello and Allen Toussaint. The lyrics describe a love that the narrator had for someone, which they believed to be the greatest love they had ever experienced. The narrator also wished for the other person to love them in return. However, the narrator eventually discovered that the person they loved had been lying to them. They realized that the love they had hoped for could never be. Despite this betrayal and the hurt caused by it, the narrator admits that they still love the person who deceived them. The song portrays the emotional journey of someone who believed they had found a great love, but ultimately had their heart broken. It explores themes of love, trust, and the complex nature of relationships. The lyrics reflect the narrator's deep feelings and vulnerability, as well as their struggle to let go of their love for someone who betrayed them.