I have this one in one of my playlists. I regularly blog on Swedenborg at http://dream-prophecy.blogspot.com/. I would sum up everything under two principles: that God is one in person, who appeared in human form as Jesus Christ, and (2) it is necessary to live a life according to the commandments. And that is it! All of his writings revolve around those 2 principles.
Doug, Thanks for your comment and the pointer to your blog, which I read and liked. Yes, that is indeed the a good summary of Swedenborg's theology. I would add a third basic principle: We are spiritual human beings meant for a spiritual human eternity of happiness, growth and use in the context of marriage and community. Note that I have highlighted human.Roger