Lucifer excelled to become one of the great ones among the Father's children
Angels are not and never were created as God's children. They are SERVANTS created to tend to Gods true children, CHRISTIANS.
All human beings who do not have the Holy Spirit are not God's children. They are the children of the devil -- satan
Angels are nothing more than messengers. They are not a different species than man. Angels are either unembodied spirits or men or resurrected men.
Acts 10:30
30 And Cornelius said, Four days ago I was fasting until this hour; and at the ninth hour I prayed in my house, and, behold,
a man stood before me in bright clothing,
Genesis 19:1-5
1 And there came
two angels to Sodom at even; and Lot sat in the gate of Sodom: and Lot seeing them rose up to meet them; and he bowed himself with his face toward the ground;
2 And he said, Behold now, my lords, turn in, I pray you, into your servant’s house, and tarry all night, and
wash your feet, and ye shall
rise up early, and go on your ways. And they said, Nay; but we will abide in the street all night.
3 And he pressed upon them greatly; and they turned in unto him, and entered into his house; and he made them a feast, and did bake unleavened bread,
and they did eat.
4 But before they lay down, the men of the city, even the men of Sodom, compassed the house round, both old and young, all the people from every quarter:
5 And they called unto Lot, and said unto him,
Where are the men which came in to thee this night? bring them out unto us, that we may know them.
In the last verse above, in the phrase "that we might know them", the word "know" is the same as it is in Gen 4:1:
Genesis 4:1
1 And Adam
knew Eve his wife; and she conceived, and bare Cain, and said, I have gotten a man from the Lord.
Basically it means to have sexual intercourse. So the homosexual men of Sodom sought to have sexual intercourse with the angels (men) who came to the home of Lot.
Revelation 22:8-9
8 And I John saw these things, and heard them. And when I had heard and seen, I fell down to worship before the feet of
the angel which shewed me these things.
9 Then saith he unto me, See thou do it not: for
I am thy fellowservant, and of thy brethren the prophets, and of them which keep the sayings of this book: worship God.
Angels are men who have come to this earth or will come to this earth. They are not a separate species than mankind. All mankind are the spiritual offspring of our Father in heaven.
Hebrews 12:9
9 Furthermore we have had fathers of our flesh which corrected us, and we gave them reverence: shall we not much rather be in subjection unto the Father of spirits, and live?
Acts 17:27-29
27 That they should seek the Lord, if haply they might feel after him, and find him, though he be not far from every one of us:
28 For in him we live, and move, and have our being; as certain also of your own poets have said, For we are also his offspring.
29 Forasmuch then as we are the offspring of God, we ought not to think that the Godhead is like unto gold, or silver, or stone, graven by art and man’s device.
Satan, before being cast out of heaven was not considered wicked and was a son of the morning which I believe were among a group also known as the morning stars. I believe these were exceptional children among the father that used their free will to excel above others in the pre-mortal world of spirits. Jesus himself is known as the bright and morning star.
Revelation 22:16
16 I Jesus have sent mine angel to testify unto you these things in the churches. I am the root and the offspring of David, and the
bright and morning star.
In the book of Job we learn that these morning stars sang together and then they and all the rest of the children of God shouted for joy when God laid the foundations of the earth.
Job 38:3-7
3 Gird up now thy loins like a man; for I will demand of thee, and answer thou me.
4 Where wast thou when I laid the foundations of the earth? declare, if thou hast understanding.
5 Who hath laid the measures thereof, if thou knowest? or who hath stretched the line upon it?
6 Whereupon are the foundations thereof fastened? or who laid the corner stone thereof;
7 When the morning stars sang together, and all the sons of God shouted for joy?
It was the pride of Lucifer which was his downfall. It lead him into open rebellion against the Father and Jesus Christ while in their very presence. Why do you think that Lucifer was able to be in heaven up until that time? Or why was he considered a fallen being if he was already an evil being?
Isaiah 14:12
12 How art thou fallen from heaven, O
Lucifer, son of the morning! how art thou cut down to the ground, which didst weaken the nations!
Satan was one of the children of God who came out in open rebellion against his Father and sought to turn the rest of God's children against him. For this reason he was cast out of heaven and became Satan and the devil. From that time forth he still sought to overthrow the Father and his followers. Through his free will he chose the path of wickedness and evil and was also given the name Perdition which connotes those of the second death or spiritual death.
Satan, upon being defeated by God is said to be a man in Isaiah 14.
Isaiah 14:16
16 They that see thee shall narrowly look upon thee, and consider thee, saying,
Is this the man that made the earth to tremble, that did shake kingdoms;
There have been a few in this life who have rebelled against God and have become known as Sons of Perdition. Cain was one and Judas Iscariot was another. The antichrist of the last days will also be a son of perdition. Those who rebel against God and sink to this level neither receive forgiveness in this world nor in the world to come. They have committed the unpardonable sin.