A couple of comments on the current discussions about penal substitution.
Maurice McCracken offers a helpful reflection at The Coffee Bible Club:
"To say that we believe in cosmic child abuse is a cruel, nasty unpleasant and vitriolic thing to say. We need to defend ourselves against that accusation. We don't believe in that. But Chalkey and lots of other people I have come across who don't like PSA, the reason for their criticism of the doctrine is (they say) because of the people who teach PSA. Those people don't love well, according to the criticism. They don't love each other or the world well. They don't seek the good of those around them. And that's because, according to the critics, they believe that God hates the world; God feels violently towards the world, and it's only sweet little innocent Jesus who stands in the way of us being smashed by God's uncontrollable violent feelings towards us.... Steve Chalke and your friends, wrong diagnosis, but good one for spotting the symptoms."
Adrian highlights Martyn Lloyd-Jones' words on this kind of issue.