The eternal existence of believers is almost impossible to comprehend. A serious consideration of what things will be like in eternity soon brings the mind to the end of its imagination. The most profound speculations end grasping at tenuous threads of understanding. One matter of question is the internal makeup of the believer. Will the saved have freewill in eternity? If they do what is to keep them from sinning? If they don’t would that not mean they are little better than organic robots?
The Bible’s teachings about eternal joy does not provide a psychological profile of the saved. Scripture describes the bliss of eternity in the presence of God, the beauty of the place God will make for His people and the glory of God. The Bible does not say much about how men will think, how they will act or what will motivate them in eternity.
In the Old Testament one key passages helps makes sense of these questions. Jeremiah 31:33-34 says, “After those days, saith the LORD, I will put my law in their inward parts, and write it in their hearts; and will be their God, and they shall be my people. And they shall teach no more every man his neighbour, and every man his brother, saying, Know the LORD: for they shall all know me, from the least of them unto the greatest of them, saith the LORD: for I will forgive their iniquity, and I will remember their sin no more.” God promised the believing Israelites, and all believers (Hebrews 8:6-8), to place His law in their hearts. He promises to re-create the person to place His law within them. In eternity none will need to teach another the truths of God because everyone will know Him. The heart transformed and written with the law of God so changes the person that he will always desire to do what God has commanded. He will no longer desire to do that which is contrary to God. In eternity the saved will will always desire to do that which is right.
The Bible does not say anything else about the extent of human freedom in eternity. Revelation speaks of the nations serving God and going into the city to bring their gifts to Him. This may imply substantial freedom of movement and decision, in which the person is able to come and go, labor and serve how they please. Whatever the saved do in eternity they will do of their own freewill because they desire to please God.
Many understand free will as the ability to do anything desired, regardless of whether it be right or wrong. This is not so. Having a heart that only desires to do the will of God does not make the person an automaton. God is the only being in the universe with ultimate and true free will. He does whatever He pleases. (Psalm 115:3) At the same time God does not and cannot sin. He is not limited in his ability or His freedom. He cannot sin because sin is foreign to His nature. This does not constrain His will or bind His freedom.
A man cannot determine to become a hen and then lay eggs. This is no restriction on his freedom but a product of his. None but a deranged man would desire to sit in a box of straw and cackle while he deposited calcified ellipsoids. The saved will be given a new nature which delights to do the will of God. The ability to dishonor God is not an improvement on the nature of man, it is a derangement of man. The will of the eternally redeemed can no more desire to sin than a human male can lay an egg. This is not bondage but true freedom.