The Church
The Christian Church is the primary subject of scrutiny in this book. The arguments that Dawkins disentangles are those he has heard from Christian people in his community who often dispute with him about religion. He is an atheist, proudly, and therefore, he has a strange appreciation for the Church imagery that other people tend to accept tacitly. He sees something perfectly absurd in the post-modern sense, whereas religious people see regular old life.
God, the empty space
Whenever a person can't explain something reasonably or scientifically, this is where they tend to see God. This is the God of the gaps, and Dawkins explains how compelling this imagery is to the people who are compelled by it. However, Dawkins reminds his reader that there is no objectivity in this experience, and that it is convenient and historically wrong. Compared to science, religious assumption tends to be chronically incorrect.
Science and imagery
Dawkins works to explain what science actually is, compared to what the majority of people experience of it through shared imagery assumptions. Dawkins says that the purpose of science is to stay curious. Beliefs work contrary to that purpose by saying that something is mysterious just because science doesn't understand it yet. He says that science is a chronic revelation through communal efforts in time, and of course we don't know what we might discover tomorrow.
Reason and argument
Although the reader herself/himself is responsible to parse these arguments for their objectivity, Dawkins himself encourages scrutiny for the most part. Instead of belief, Dawkins urges his reader to be committed to reason and argument. This imagery can be seen for its mathematical value of "if/thens," and Dawkins's reason leans on the positivistic side, because he finds that proof is an obvious prerequisite for assumption. This leaves no room for religious belief.
