One of Jennifer F.'s
posts over at Conversion Diary and a very different
post I ran across thanks to a
post on Bishop Alan's blog got me thinking on this subject again, and this time I decided to work out what I think here.
"Prove that God exists" is a relatively common taunt to come from the relatively militant atheists. How might this be done, or is it simply impossible? Many people have addressed the question over the ages and most of the attempts, at least judging from the Wikipedia
article, seem to be firmly grounded in thinking about the subject. I would prefer to take a more scientific approach.
The first point, therefore, has to be a close examination of the hypothesis, "God exists", so that we can ensure that the proposed test fits the nature of the subject. What do we mean by "exists"? If only physical things can be said to exist, then either God doesn't exist or God is so far removed from Earth as to be inconsequential. It is worth noting, however, that holding strictly to the view that only physical things exist impoverishes our ability to talk about things like Harry Potter or the mind. It is also worth noting that, at least in the case of Christians, God is said to be some sort of spiritual reality existing outside of space and time as we know it. If we assume, then, that spiritual realities might exist, then we can go on to think about what God is before we go looking for it.
In addition to God being transcendent, I think the most important point to note is that Christians also hold that God is a sort of person. If we had to prove that a specific person exists, how would we go about doing it? The easiest test would probably to look them up in the phone book, call them, and arrange a meeting. God, being transcendent, isn't in the phone book, so we must try one of the harder tests. The next easiest way is probably to ask those who might have known the person about the person. If they say that the person is real, then we might assume that the person exists. However, if we don't trust those who claim to have known the person, or if accounts of the person are contradictory on some point important to us, then we would have to take what is probably the hardest path and go looking for the person in places they supposedly like to visit and doing so often enough to have a reasonable chance of meeting the person. In God's case this means looking in one of several places. First, since many talk about encountering God through art or nature, one can travel to beautiful places in the world, sit back and let it soak in, and then later reflect on whether that experience of beauty was an encounter with the divine. Second, since for Christians the church is the Body of Christ and the sacraments convey God's grace, one can become a member of a church and/or receive the Eucharist for several years. The challenge with this method is that it isn't enough to just show up physically while internally holding on to the position that the whole thing is stupid or just a show. Becoming a member of a church requires that one also willingly participate in the life of the church. So, for example, one needs to make sure one can enjoy the company of the folks who attend the church and volunteer for various ministries of the church. Ministries to the poor tend to be especially powerful experiences. As a general rule asking whether God exists is unhelpful for this test since it tends to make it harder to feel fully integrated in the church community. After being part of the church for several years reflect back on the experiences and consider whether one has met God in them. Third, folks of a variety of faiths hold that meditation or contemplative prayer can result in encountering the divine. For this test the attitude which one brings to the test is absolutely critical, even more so than the previous two tests. If one approaches contemplative prayer planning on forcing something out of it, one will never really enter the meditative state. The challenge of contemplative prayer is to become profoundly quiet inside. This doesn't mean having no thoughts at all; it means letting the thoughts come and go without letting them trouble the core that is oneself. A short word or phrase is generally found helpful in this endeavor and some forms of contemplative prayer center on using repetitive prayers to keep the mind busy while one's core slides into silence. Since it takes time to start adjusting to contemplative prayer one needs to practice every day for several years before one might encounter God.
It should be clear that none of the three tests (beauty, church community, or contemplative prayer) can guarantee that one will find God on some specific occasion. The attitude to adopt here is that of the avid bird watcher hunting for some rare bird, go where it may be and pursue it in hope.