From Roger Olsen’s Does God Change?:
What I “saw” early on in my theological training, however, was that those evangelical theologians who strongly touted God’s “immutability” were not very consistent about it. At least that’s what I thought I noticed in their writings. On the one hand, I was told, a good evangelical believes God is impervious to any change including having new experiences. On the other hand, I was told, it was the Son of God, the second person of the Trinity, equal with the Father and Holy Spirit, who experienced the incarnation including hunger, thirst, temptation, sorrow, pain and even death. The explanation? That he experienced these things only “through the human nature he took on” through Mary.