I'd always assumed that "Kingdom of Heaven", and "kingdom of God" meant the same thing until I learned that some scholars believe those were separate things. Jesus did refer to the kingdom of Heaven as being within and coming out to spread upon the earth. I wonder if he would have said that God is within and comes out to spread upon the earth? I don't think he would but I only majored in religious studies, and read the OT and especially the NT many times and I'm not anything near being a scholar. And I wasn't there to meet him in person :), If, as Jesus said, the kingdom of Heaven comes from within then Hell must do the same which, to me, means that this life is both Heaven and Hell. What we do in our daily lives determines which we live in.