He was the head among the angels of heaven, and the most beautiful of angels. But was cast out, when his heart, full of pride, rose up in jealousy against God. 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! For thou hast said in thine heart, I will ascend into heaven, I will exalt my throne above the stars of God: I will sit also upon the mount of the congregation, in the sides of the north: I will ascend above the heights of the clouds; I will be like the most High. Isaiah 14:12-14 Thou art the anointed cherub that covereth; and I have set thee so: thou wast upon the holy mountain of God; thou hast walked up and down in the midst of the stones of fire. Thou wast perfect in thy ways from the day that thou wast created, till iniquity was found in thee. Thine heart was lifted up because of thy beauty, thou hast corrupted thy wisdom by reason of thy brightness: I will cast thee to the ground, I will lay thee before kings, that they may behold thee. Ezekiel 28:14,15,17
A WARNING FROM PAUL- But I fear, lest by any means, as the serpent beguiled Eve through his subtilty, so your minds should be corrupted from the simplicity that is in Christ. 2 Corinthians 11:3 For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places. Ephesians 6:12
Lucifer(satan, the devil) fell because he lifted up his heart with pride-thats why Every one that is proud in heart is an abomination to the LORD... Pride goeth before destruction, and an haughty spirit before a fall. Proverbs 16:5,18 -- Notice the glaring contrast between Christ and Lucifer--Lucifer up in heaven raised his heart up in pride against God in rebellion -- and down here on earth, Christ went with meekness humbly to the cross -- When Jesus therefore had received the vinegar, he said, It is finished: and he bowed his head, and gave up the ghost. John 19:30