From Hope’s Reason:

I would not consider myself to be an open theist. But the question is: Is open theism a heresy? As I said, I know Clark Pinnock and I deeply respect him, not just intellectually but as a Christian. He has a passionate love for Christ and I believe that he is serving the Lord with all his strength. I can disagree with Clark on certain issues but I can not deny his love for Christ. To me, heresies are most often defined by an inadequate Christology, such as the Jehovah’s Witnesses’ belief of Jesus as the archangel Michael. I have seen no evidence of any heretical tendencies in their Christology. I continue to be skeptical about open theism, but I am not able label them as a heretical movement. They are Christian brothers and sisters that I have some disagreement with in theology.