This quote means that we can only learn to love by showing love to others. We cannot teach ourselves to be loving by simply thinking about it or reading books about love. We must actually show our love to those around us in order to truly learn how to love. This could involve spending time with people we care about, expressing our affection and appreciation to them, helping them in whatever way we can, and being generous and kind. Through this active demonstration of love, we learn what it truly means to love.