God did a lot more than just say He loved us. He made His love toward us visible and public by sending His Son into the world to die for us. The greatest expression of love ever known to mankind. If we truly know God and if we believe and understand His love for us, then we will love one another. Loving one another is evidence that we live in Him and He lives in us through the Holy Spirit. When we love one another, we present the invisible God to the world just as Jesus did.