Revelation 12:7 And there was war in heaven: Michael and his angels fought against the dragon; and the dragon fought and his angels, 8 And prevailed not; neither was their place found any more in heaven.
With the indulgence of pride, Lucifer couldn’t reason out things logically in a number of instances, because pride can cause one to think and act in a manner that is irrational, for the simple fact that pride interferes with deep rational thought. Even though some may not know it, pride inevitably leads to presumption, meaning that you would end up taking risks that are not well thought out. This is what happened when there was war in heaven.
If Lucifer had studied the situation thoroughly, with a humble spirit, he would have seen and known that it was a futile venture to enter into war against God. But pride, and the craving for worship and adoration has the effect of warping a person’s thought process and if the situation is not promptly corrected, it will send a person completely off their rockers, and put them in untenable situations, they would try in vain to extricate themselves from.
Being humble involves much more than manifesting an outward appearance of piety, for there are folks who may dress pretty humbly, and yet their hearts are swelling with pride. God is not deceived, nor is He impressed with mere outward manifestations of humility. Many scribes, and pharisees of Christ’s day went to great lengths to exude a persona of humility, but when it came time to accept God’s revealed will, or to confess that they were wrong many of them were a no show.
Matthew 13:15 For this people's heart is waxed gross, and their ears are dull of hearing, and their eyes they have closed; lest at any time they should see with their eyes and hear with their ears, and should understand with their heart, and should be converted, and I should heal them.
May The Lord add His blessing to the study of His word. God bless!