Last week & last night I watched a DVD-Documentary called 'The Privileged Planet' which argued against popular secular thinking that earth is simply an insignificant 'pale blue dot' in the universe. The film gave all sorts of evidence for 'design' and 'purpose' in the formation and location of our planet.
Without ever mentioning God or even hinting toward Christianity, the movie reminded me of two key points: 1) God exists and 2) God cares. The 1st half of the film focuses on that first point by showing that it is all but impossible for the earth to have come about randomly (minus an intelligent being). The second half declares that not only was the earth specially created, but it was specifically designed so that we could observe and grasp the greatness of the universe. In other words, not only is there almost certainly a Creator, but there is a Creator that wants us to know more about Him & His work. God exists. God cares. To me, that is the general revelation that we can learn from nature.