His writings are VERY deep, but I'd highly recommend Heaven and Hell. He takes a spiritual approach to all concept of the bible, and everything is about correspondences. (example, the sun is our light and heat in the natural world, while God's light is the light (which is truth) and heat (which is love) in the spiritual world. It makes you really examine who you are inside--something most of use don't even know because we are taught from childhood to be concerned about our external appearances. When you start asking those questions, you'll find how really stumped you truly are and begin to question your true motives and loves.
He was WAY ahead of his times (1700s) and a lot of what he said proved to be accurate (he was a genius in just about every subject and a very high ranking gov't official). He had to publish the books anonymously, which they found him out in his 80s, and went to court due to it. What I find most amazing it that it has NOTHING to do with religion and basically EVERY religion is right but all that doesn't matter. He tells you what exactly happens from the moment of death and how people end up in heaven or hell, what is really is (not the fire and brimstome we think of) and how WE actually PUT ourselves there bc that's what WE WANT or love.
For example, somone who loves money more than anything wont be in heaven where people find joy in serving and being good to their neighbor, so they find those like them to keep company with and that is in a community of hell. Very deep stuff. If you don't want to read (which you can download any free books from the swedenborg foundation) I would recommend watching a youtube or 2 episodes of Swedenborg and Life from OfftheLeftEye...there are so many to choose from.
Oh! A very important part of Swedenborg's teaching is that in the afterlife we no longer have the ability to deceive others with what is in our hearts. Here someone can donate to charity and look good, yet the motive might be to get elected for power, or to become popular, or to hide the evils they have done, or to look 'righteous', or simply because they truly love the cause they are donating to. We can't tell because we all outwardly look the same. In the afterlife, there is no way to deceive bc our thoughts are out there for everyone to see and we no longer have the concern of how we appear, so what we truly are at heart we pursue with passion---good being good things, and evil being evil things. If you see it this way you can see how people could end up in a heaven or a hell. And heaven and hell are state of minds rather than streets of gold like so many thing. So there's NO way to get into heaven if you are evil, because that would not correspond with your state of mind. You'd find pleasure in what we would think of as hell. As absurd as that sounds--I find it highly believable...more believeable the the God who uses a reward/punishment system (which I find totally manmade because I think God is deeper than that).