Wow. There are so many responses that it is hard to address them all. I thank you all for continuing this discussion. All of it is very interesting.
I agree with FCEGM that eternal blessing of life is in fact eternal and can never be taken away (Mat 25:46, Mrk 10:17, Jhn 3:15, Jhn 6:54, Rom 2:7, 5:21, 2 Tim 2:10, Tit 1:2, Heb 9:12, 9:15, 1 Jhn 5:13); therefore, once the saints are saved, their eternal blessing cannot be taken away from them, else you call the Lord a liar. And thus therefore, the saints cannot sin once they are raised to glory, since sin is an affront to God, which he will not tolerate. We know also that peace shall be in the Kingdom (Isa 9:7, Rom 14:17, 1 Cor 7:15) and we know that there is peace in Heaven because the Lord is the God of Peace (Isa 9:6, Rom 15:33, 16:20, 1 Cor 14:33, 2 Cor 13:11, Phil 4:7, 9, 1 Thes 5:23, Heb 13:20). The whole point of Christ was to be a mediator (Job 33:23, 1 Tim 2:5, Heb 9:15, 12:24) to bring man close to the Father and be saved from eternal damnation. If saints can sin and fall away again, then Christ is rendered to no effect.
I believe the point of why Adam and Eve were not permitted to eat of the fruit of Life was because they would live eternal in their sinful state. First this sinful state must be cast off and then they can be made to live eternal. The only way to rid ourselves of this nature and the curse of death that comes with it is through Christ Jesus. Thus, saints cannot sin. And if saints who are likened to the angels cannot sin, then angels themselves cannot sin, for they are the intermediaries of God.
I will perhaps present this fact that those of God bear the name of God (El and Yah (or Jeh)), though many perhaps know this: EL-ohim, Micha-EL, Gabri-EL, Nathani-EL, Isra-EL, Ezeki-EL, Dani-EL, EL-ijah, EL-isha, Samu-EL, Jo-EL, Isai-YAH, YAH-shua, YAH-sus, Zachari-YAH, Mic-YAH, Jeremi-YAH, Emanu-EL etc. These were of the angels and of the prophets and men who performed the will of God. Could they perform the works of God if God was not with them. Even the other name of Jesus (Emanuel) means the Lord with us and Jesus (a form of Joshua) means the Lord saves. So if the Lord is so with these that He is in their very label or name, how could they err against Him in their duties? I am not saying that the prophets were indeed perfect (they were men with sin in the flesh), but the Scriptures they wrote are indeed perfect. Thus, angels or saints who have been given incorruptable (Acts 13:34, Gal 6:8) bodies cannot corrupt them through sin (Isa 38:17, Hos 9:9).
This does not mean that love is restrained; love is in fact restrained in slavery by our sinful flesh (Jhn 8:34, Rom 6:6-22). We would love more because we are not focused on the things of the flesh, which sin resides (Rom 7:5, 7:25, 8:3), but the things of the spirit (Rom 8:5, 15:27, 1 Cor 2:10-15, 9:11, Gal 5:17) which gives love (Gal 5:22, 2 Tim 1:7, 1 Pet 1:22). Out of free will in faith we love the Father (Gal 5:6, Eph 6:23, 1 Tim 1:5), but when we are exalted to glory, we no longer need faith, for He is with us, and that love is perfected (1 Jhn 4:12-18). Concerning free will of angels, they have free will but cannot go against the Lord or sin (sin is restrained).
I will try to explain why I think that spirit in all uses is the force that drives things, people, nature, etc. Please ask me if I do not explain myself thoroughly. The Hebrew word translated spirit is Ruwach which means the movement of air or wind (an invisible force) and is figuratively used as a mindset or a driving force (rather than a supernatural bodily form) such as a leaf blown by the wind. The “good” spirit (ruwach) of the Lord (Yahweh) was taken out of Saul and the evil (rah - troublesome, wicked) spirit (ruwach) of the Lord (Yahweh) given to Saul (1 Sam 16) was that of depression and paranoia which drove him to hurl spears and try to kill David on many occassions. Now these spirits were both given and taken away by the Father Himself! Not of any evil supernatural power.
It seems that it came to pass that mental infirmities or malaties were called “evil spirits” or rah ruwach by the Israelites. This was the continued practice in the days of Jesus, but they also had a new word it seemed from the Greeks called daimon (demon) that was probably introduced during the time of Alexander the Great when he conquered the land. Now the term “demon” seemed to be used almost interchangeably with “evil spirit” (Mat 8:16, Luke 8:2). And from Scripture we know that an evil spirit was treated the same as any infirmity or illness (Luke 7:21, 8:2, Acts 19:12) but also, one need only look at the symptoms of those who had these “demons” or “evil spirits” to know that they had serious mental disorders.
Now spirit in the new testament is pneuma in Greek. The pneu- prefix means simply air or lung and -ma suffix means action. Think of the word pneumatic meaning powered by the movement of air. Thus, pneuma is exactly like the word ruwach meaning simply, the movement of air or wind and figuratively means an invisible force driving or moving something… for example, a leaf (us) on the wind (mindset). Isaiah 64:6 emphasizes this point: “We have all become like one who is unclean, and all our righteous deeds are like a polluted garment. We all fade like a leaf, and our iniquities, like the wind (ruwach), take us away.”
Haydock’s Commentary, a very orthodox one, sees them as the general population before the Flood, men given over to their passions, choosing as they will among the fair women.