The bible teaches that we demonstrate the love of God within us by keeping his commandments, which are to love him with all our heart, soul, mind, and strength; and to love our neighbor as ourselves. We love God when we turn (repent) from our sin and love one another as a reflection of his son Jesus in this dark world.
Everyone who believes that Jesus is the Christ has been born of God, and everyone who loves the Father loves whoever has been born of him. By this we know that we love the children of God, when we love God and obey his commandments. For this is the love of God, that we keep his commandments. And his commandments are not burdensome. For everyone who has been born of God overcomes the world. And this is the victory that has overcome the world—our faith.