What was important, he said, was "the interplay of different dimensions of reason, an interplay which opens up into the road to faith."
The pope argued that Christianity was a religion of reason, but a reason that was wider than the limited scope of modern science.
For the pope, science reaches its limits when its assumptions can no longer be tested.
However, Pope Benedict said, God cannot be used simply to explain away the problems.
"It's not as if I wanted to stuff dear God into these gaps," he said. "He's too big to fit into such gaps."
Pope Benedict also took a firm stand against science books' tendency to suggest that things came about by nature and evolution.
"The question has to be asked: What is nature or evolution as (an active) subject? It doesn't exist! If one says that nature does this or that, this can only be an attempt to summarize a series of events under one actor which, as such, doesn't exist," the pope said.
Nature and evolution are made up of many individual steps, and the guiding hand -- the active subject -- is God, he said.
I wish leaders of other Christian faiths could just see this.