A corollary to that would be, of course, that all of us here on Earth are beloved of God, and in God, we have siblings to cherish and love as well. Sometimes, though, loving our siblings can be a pretty apathetic act - we acknowledge that we should love them, but do we actually allow our love, the love of God, to flow through us to them?
What makes it hard to love someone? For you, specifically? Does it help to remember and remind yourself that you are beloved of God?