My belief is that the spirit world is in another dimension. There are doors that open and close to get there or here. Jesus is in charge of the doors.( read passages about doors and gates). The fallen ones are here and have been here since the Fall. Knowing Jesus and His Word is the key for all of this. The more seriously we read and believe His Word, the more success we will have in the spirit realm. many Christians don't believe in Angels and demons and their walk with Jesus becomes confusing, milq toast, collection of allegorical tales. The Bible is clear, and concise and is to be believed as written. Any mistakes we find are the choice of translation from Hebrew and Greek, or our weak understanding of what is being said.
An example would be Genesis 4:26. The last line of 26 says "Then men began to call upon the name of the Lord." Translated from Hebrew it really says "Then men began to profane or defile the name of the Lord. The meaning is changed to the extreme, which has caused massive misunderstanding for centuries. Knowing this is the time idol worship and unbelief began might suggest this will the Fallen angels were contaminating the seed of the woman with the seed of the serpent at the time of Seth and Enos. Understanding the corruption of the creatures made in the image of God is one of the central themes of the whole Bible. A person that denies demons exist and can interact with humans leaves them completely unarmed for spiritual battle. As we watch these Bible truths fade into the past, we are bound to suffer all the wiles of the devil until he kills us. Don't go to a gun fight with a knife. Put on the whole armor of God. All of it! It is NOT flesh and blood that we war against.
Your comments are excellent..
“My belief is that the spirit world is in another dimension.”
Just as two or more TV channels can exist on the same cable at the same time and appear separate, so it is with Heaven. They are at different frequencies.
Heaven is right here, right now, but it exists at a different frequencies of consciousness. My Father’s Mansion has many rooms, each existing at a different frequency.