No one can answer this. No matter how religious or in touch you are with God.
 

Alright, so the christian will believe Lucifer was thrown down to hell by God, for trying to rise higher than God. This means, there is a possibility that there is higher than God. This will connect later in the explanation. So Lucifer is the source of all evil, as Christians believe. And everything that God creates is pure. If God created his angels, then where did this evil come from, that entered Lucifer. There must be another higher source of evil. We can refer to it as, eternity evil. As stated, God will not allow anyone to rise higher than himself. This means, there must be higher realms, above heaven. Or that it is possible, to become consciously greater in power than God. Now you may argue that Lucifer only had those thoughts, as a thirst for power. But if he has these thoughts, there must be a reason to them. That there is higher than God. Now when Adam and Eve ate the forbidden fruit, Lucifer said to them, you shall be like Gods. ""For God knows that when you eat from it your eyes will be opened, and you will be like God, knowing good and evil". You will be like God. "As we are all descendants" of Adam and Eve, we are all God in our own ways...as many mystics describe. Being God must signify, knowing good and evil. So angels were not created as Gods, they only knew good, as Adam and Eve. This question comes into play now: how did Lucifer become Evil? The only answers are: God has evil "DNA", or there is a higher source of evil. Also, how did Lucifer go straight from, the highest angel in heaven, to the greatest devil known. Was this Gods jealousy who transformed him? Why did the angels who followed him, not attain as much power as him? If evil can only be evil, how can Lucifer to good things on this planet? The bible states he can deceive people by doing good. .........Also off topic. The reason why the bible is considered more of a philosophy book which you take points from is, there are multiple authors with different views, which creates many contradictions. There are also many personal opinions stated. However, I do believe the 10 commandments are to be followed. Even on a moral basis.

Without mountains what will you climb ?

If there are mountains, why would you climb them?

To get to the top :D

'God did not create evil. Just as darkness is the absence of light, evil is the absence of God'
- Albert Einstein

So evil created itself from purity? Obviously not. There must be a greater source of evil. God was never absent when the angel sinned. Also, it states sin will never enter heaven. How did the angel sin?

The person who is talking is not 'who you really are'.
And that voice will take you on a long and painful journey, if you let it.
If you do not love your real self enough, the false will enter you.

All this you're driving at, it's allegory, not literal ...

Enough with all these random religious quotes, just because you cannot explain what I have written.

Why do you seek answers to your question so intensely? It feels like you may have explored these thoughts for quite some time to express so passionately as you do.

I believe that no one can ever be sure of that to which we can never be sure of. There can never be any satisfactory response to these questions. Seeking will always seems like an open wound without the ability to heal.

It would be interesting as to read what you may believe could be the answers to your questions.