God revealed Himself to Moses as the Great I AM, and in the Book of Revelation's first chapter, it says: I am Alpha and Omega, the beginning and the ending, who is, and which was, and which is to come, a clear realization that God is infinite. And Jeremiah, the prophet stated that God filled heaven and earth which is supported by Psalm 139. Again Jesus clearly stated that heaven is within us and we enter that heavenly state through righteousness and joy in the Holy Ghost.
Jesus spent a lot of time explaining the kingdom of heaven in parables, and we would exhort everyone to read Matthew, chapter 13 carefully. In the parable of the Sower, the person who hears the word of God and keeps it shows forth the fruits of the Spirit and so enters a heavenly state of mind. In another parable, the parable of the weeds, we are taught to weed out ungodly thoughts as we are led by the Spirit. The parable of the mustard seed explains that we grow in spiritual development: we grow in Christ. The Hidden Treasure and the Pearl teach us to give up everything for Christ and follow Him in
the spiritual rebirth and the parable of the Net teaches us to hold fast to that which is good and flee
from evil.
Our leader, Mary Baker Eddy, exhorts us to stand porter at the door of thought and hold thought steadfastly to the enduring, the good and the true. In yet another parable, our Master cites the humility and the receptivity of little children as a basis for entering the kingdom. When the Pharisees asked when the kingdom would come, He warned them not to look for it in any particular place but to look within, clearly showing that it is a state of spiritual development.
The only conclusion one can draw from this is that heaven is a holy, harmonious spiritual state or
consciousness - spiritual perfection, and not a geographical location. We enter that state here and now and in the world to come.