1. God’s love is incomprehensible.

No human mind can comprehend God. We cannot define God. We cannot provide a comprehensive account of who he is. He "dwells in unapproachable light" (1 Tim. 6:16). If God is incomprehensible, then so is his love. While we may and must speak truthfully about his love, we can never fathom it, because it is divine love, as different from our love as his being is different from our being.

2. God’s love can be known.

We cannot define God in the sense of delimiting exhaustively who he is, but we can nonetheless describe him truthfully. We can do so because he has made himself known to us in his Word and he opens our eyes to that Word by his Spirit. How is that possible, given the divine difference? It is possible because God makes himself known to us in creaturely reality. He takes up the things he has made and uses them to describe himself to us. Thus he is a lion, a rock, fire, even moth and dry rot (look it up!).