I don’t know if he ever said it, but I know he lived it: “People don’t care how much you know until they know how much you care.”
In his presentation of the last night of Christ’s life John notes that, “Jesus knew that the Father had put all things under his power, and that he had come from God and was returning to God; so he got up from the meal, took off his outer clothing and wrapped a towel around his waist. After that, he poured water into a basin and began to wash the disciples’ feet, drying them with the towel that was wrapped around him” (John 13:3-5, emphasis mine).
Jesus knew everything, but—unlike us—he didn’t allow that to hinder his ministry to those in need. Lost people knew how much Jesus loved them. What about you? Do lost people know how much you care or do they only hear how much you know?