Jesus from a definition of Satan. From the writings of Maria Valtorta

Jesus says to Maria Valtorta: «The primitive name was Lucifer: in the mind of God it meant" bishop or bearer of light "or of God, because God is Light. Second in beauty among all that is, it was a pure mirror that reflected the unsustainable Beauty. In the missions to men he would have been the executor of the will of God, the messenger of the decrees of goodness that the Creator would have transmitted to his blessed children without fault, to bring them
higher and higher in its resemblance. The bearer of the light, with the rays of this divine light that he carried, would have spoken to men, and they, being without fault, would have understood these flashes of harmonious words, all love and joy. Seeing himself in God, seeing himself, seeing himself in his companions, because God enveloped him in his light and blessed himself in the splendor of his archangel, and because the angels revered him as the most perfect mirror of God, he admired himself. He had to admire God alone. But in the being of all that is created, all the good and evil forces are present, and they agitate until one of the two parts wins to give good or bad, as in the atmosphere are all the gaseous elements: because they are necessary. Lucifer attracted pride to himself. He cultivated it, extended it. It became a weapon and seduction. He wanted more than he didn't. He wanted it all, he who was already a lot. He seduced the least attentive of his companions. It distracted them from contemplating God as supreme Beauty. Knowing the future wonders of God, he wanted to be him in the place of God. He laughs, with troubled thought, head of future men, adored as supreme power.
He thought, "I know the secret of God. I know the words. The drawing is known to me. I can do anything He wants. As I presided over the first creative operations I can proceed. I am". The word that only God can say was the cry of ruin of the proud. And it was Satan. It was "Satan". In truth I tell you that the name of Satan was not put by man, who also, by order and will of God, put a name to everything he knew to be, and that he still baptizes his discoveries with a name created by him. In truth I tell you that the name of Satan comes directly from God, and it is one of the first revelations that God made to the spirit of one of his poor children wandering on earth.
And as my Name Ss. Has the meaning I once told you, now listen to the meaning of this hideous name. Write as I tell you:
SATAN
Sacrilege Atheism Turpitude Anticarity Denial
Superb Opposing Tempter e
traitor Greedy Enemy
This is Satan. And these are those who are sick of Satanism. And again it is: seduction, cunning, darkness, agility, wickedness. The 5 cursed letters that make up his name, written with fire on his electrocuted forehead. The 5 cursed characteristics of the Corruptor against which the 5 blessed wounds of mine blaze, which with their pain save those who want to be saved from what Satan continually inoculates. The name "demon, devil, beelzebub" can be of all the dark spirits. But this is only "his" name. And in Heaven he is named only with that, because there the language of God is spoken, in faithfulness of love also to indicate what is wanted, according to how God thought it. He is the "opposite". What is the opposite of God. What is the opposite of God. And every one of his actions is the antithesis of the actions of God. And every one of his studies is to bring men to be against God. This is what Satan is. It is "going against Me" in action. To my three theological virtues opposes the triple concupiscence. To the four cardinals and to all the others that spring from Me, the serpentine nursery of its horrendous vices. But, as it is said that of all the virtues the greatest is charity, so I say that of his anti-virgins the greatest and to me repulsive is pride. Because all evil has come for it. For this reason I say that, while I still feel sorry for the weakness of the flesh that yields to the provision of lust, I say that I cannot sympathize with the pride that wants, as a new Satan, to compete with God. Do you pair unfair? No. Consider that lust is basically a vice of the lower part which in some has appetites that are so voracious, satisfied in moments of brutalization that daze. But pride is a vice of the upper part, consumed with acute and lucid intelligence, premeditated, lasting. He harms the part that most resembles God. He tramples on the gem given by God. He communicates resemblance to Lucifer. Sow pain more than flesh. Because the flesh will make a bride, a woman suffer. But pride can make victims on entire continents, in any class of people. Out of pride man has been ruined and the world will perish. Faith languishes for pride. Pride: the most direct emanation of Satan. I forgave the great sinners of the sense because they were devoid of pride of spirit. But I could not redeem Doras, Giocana, Sadoc, Eli and others like them, because they were the "proud" ».