Bodies Terrestial
The Bible says in Hebrews 2:6 that angels ask this question in their heart when they look at what God did with man “But one in a certain place testified, saying, What is man, that thou art mindful of him? or the son of man, that thou visitest him?” This is a thought that goes through the hearts of angelic beings. You see, the angels in heaven are not the only angelic beings, demons are also angelic beings because they were formerly angels but are now fallen angels. Demonic forces and angelic beings are all of the same kind of making in the same way God made man and we know there are people that are good and some that are evil but we’re all in the same class as men.
What God did was to give man a body which became the right for any being to operate on the earth. The Bible says in Psalms 115:16 “The heaven, even the heavens, are the LORD’S: but the earth hath he given to the children of men.” God has given the earth to the children of men to have authority over. For this reason, it is impossible for any spirit to successfully operate on the earth without the human vessel because God did not make the earth to be in the dimension that they can function in. The only way spirits can function on earth is if they’re in partnership with man.
Recognise that even God, despite having all the power, had to become man to be able to save man (John 1:14). He sent His Word and then we have Jesus. Jesus had to die a physical death to be able to pay the price for sin.