I recently read the book "Why Buddhism Is True" by Robert Wright. In the book, he outlines why and how various ideas in Buddhism align very well with modern psychology and neurology. As we learn more about how the brain functions, it seems that science regularly confirms some basic notions of Buddhism
Another good book is "Buddha's Brain".
https://www.amazon.com/Buddhas-Brain-Practical-Neuroscience-Happiness/dp/1572246952/ref=sr_1_1?keywords=buddha's+brain&qid=1560585518&s=gateway&sr=8-1
Revolutionary psychotherapeutic modalities like dialectic behavioral therapy have opened-up because of scientific engagement with Buddhist practices.
What is the Christian response to this?
It seems to me that, at its core, Christianity is founded on historical facts (e.g. the resurrection) rather than testable ideas (e.g. do our brains construct illusory narratives?). So there is no similar book that a Christian could write as a counter-point to Wright's book.
Would a Christian response to the ice cream overeater would be to pray to Jesus? It seems shallow and simplistic compared to the detailed psychology laid out by Wright backed up by scientific experiment.
Christianity is like Hinduism, it deals with reality on the mythic level. That does not make it illegitimate, as people like Carl Jung have exposed the power of myth to western audiences to tap into the deeper states of our consciousness. But fundamentalist religion distorts the nature of faith and causes religious and secular conflicts.
It feels like Buddhism and Christianity occupy different spaces entirely. When I read the writings of Buddhists it seems like they are talking about a whole different set of ideas that, while not necessarily contradictory to Christian theology, are simply ideas which Christians don't bother to discuss.
I think that's true, they are generally looking at reality in completely different ways. As close as you get to Zen Buddhism in Christianity is in medieval mysticism, and especially the mysticism of Jakob Boehme and the
Ungrund.
A few weeks ago I became aware of an inner barrenness, a lack of being in touch with my feelings, not feeling sad exactly but never feeling happy. I was feeling like real life was slipping me by. Worst yet, I had a ruminating inner dialogue that sometimes would drive me crazy. So I bought an emWave biofeedback machine and started working with it, and it has really reawakened me to that perspective on life. It is what Thitch Nhat Hanh calls "the miracle of mindfulness".
Does Christianity propose any testable ideas?
One testable idea I could think of is "Following Jesus will improve your life and/or make you more moral". There aren't many scientific studies on this so all we have to go on is mostly anecdotes for which you can find both good and bad examples. Some studies suggest that there is very little correlation with religiosity and morality.
Are religious people more moral?
I think exoteric Christianity has benefits for some people but it can also have a shadow side, and it's important to realize that not all forms of Christianity are spiritually healthy. Religious fundamentalism in particular is actual a denial of real faith. For instance, check out this Buddhist's perspective on faith:
https://tricycle.org/magazine/born-again-buddhist-2/
Many Christians in our culture do not have that perspective. They believe they alone must be right in their beliefs. It's different from the Jodo Shinshu perspective that a person's faith in the Amida Buddha is their own, and is not dependent on anything like external verification, reasoned argument, but simply on faith itself that arises naturally out of our experience. As close as you get in Christianity to this perspective are some mainline Protestants influenced by existentialism, or those with a great deal of personal mystical experience who have moved beyond a strictly dogmatic stage of religious experience.
There is actually a saying by a Church Father that I like, Gregory of Nyssa - "Ideas lead to idolatry, only wonder leads to knowing". The notion that our immediate experience of reality precedes human language is something that has been recognized East and West, but our culture has tended to forget this ever since we became enamored with rationalism in the medieval era.