it didn't work out for God's Favored
He had a falling out
Therefore, there is no such thing as a secured position
Anyone can fail
even if you have both feet inside the Door
even if you are God's favored
There is such thing as a secured position, but it must be made secure.
The truth is, by nature, irrefutable -and universally acceptable.
Anything created is based on the most basic truths concerning that of which it is made.
That includes ourselves -and the angels (even those that sinned).
However, we become aware -essentially ignorant -within a body and reality which are already extremely complex.
As we are new and lacking in experience -are "insecure" -some will inevitably "fall".
Though likely instructed as much as possible, Lucifer was not secure in belief of that which was told to him by God.
He is becoming secure in that by experience -whether he eventually repents or not.
When we become absolutely certain of -and experienced in -the truth, our position can become absolutely secure, because any tendency toward anything else has been completely eradicated.
So, it is more correct to say that the position of a new and inexperienced being cannot be initially secure -but can be made secure.
If Satan actually understood that his goal was fundamentally impossible, he would have been less likely to rebel toward that end -though he might have rebelled in general until he got that out of his system.
Creative individuals don't like being told what to do -though experience will lead us to tell ourselves to do exactly what God said to do in the first place.
Understanding that this was the case -and actually a necessary process -God allowed for us to err for a time, and has also planned to repair the effects of our errors.
It is similar to a child making a disaster area of a house for a time -after which things are repaired and made new when the child has outgrown such ways.
The entire earth -and beyond -will be dealt with likewise.
Not only will the present works on earth be destroyed and surface of the earth be made very different, but it is written that the elements will melt by a fervent heat -by which the earth, etc., will be healed of our misuse.
As for heaven, three are mentioned. There is the earth's atmosphere, essentially "space" and the specific place of the throne of God.
God has remained perfect -and even when Satan and the demons appear before his throne, he is still perfect.
His plan, however, is to make all things new -and all things perfect.
Certainly, it is his desire that they be as prodigal sons -but they do have power of decision.
We also have power of decision, but our decision is not yet based on absolute truth -which is universal. To decide otherwise is not truly an option -but we do not yet understand that.
Some here asked about opting out of life, but perhaps that is similar. Perhaps life as it should be is so awesome that opting out is also truly not an option.
Rev 3:12
Him that overcometh will I make a pillar in the temple of my God, and he shall go no more out: and I will write upon him the name of my God, and the name of the city of my God,
which is new Jerusalem