The author argues that impassibility is misunderstood:
The Bible? – What about those passages in the Bible that talk about God’s very strong feelings about things? What do they point to if God is not a passionate God? Are they “merely” anthropomorphisms that don’t “really” mean what they say? The Fathers and the medieval tradition made a distinction between ‘passions’ and ‘affections.’ An affection is a sort of controlled emotion that is subject to the will and mind of the one having it. It is a rational emotion that does not overcome the person, but is in line with the will. God has affections such as kindness, anger, etc. which he can display. The passages in the Bible talking about God’s anger, kindness, grief, and so forth are pointing to something real in God—his affections, the emotional life of the God of Israel. They are not “mere” anthropomorphisms, even though they are anthropomorphic. They are real descriptions, though not to be taken in a literalistic fashion, of God’s emotional life.