I fell in love with this quote from C.S. Lewis, Mere Christianity: "All sorts of people are fond of repeating the Christian statement that 'God is love.' But they seem not to notice that the words 'God is love' have no real meaning unless God contains at least two Persons. Love is something that one person has for another person. If God was a single person, then before the world was made, he was not love."
This statement proves what we believe. John 4:8 says, "Whoever does not love does not know God, because God is love." And John 1:1 says, "In the beginning was the Word, and the Word was with God, and the Word was God."
The next time someone says "God is love", you can share this statement proving there is a God and His name is Jesus, Messiah.