The psalmist, Asaph, mentions pride directly, as well as boasting among men and speaking loftily, arrogantly against the very God of heaven, as evidence of the driving force of the wicked person's life. Pride and wickedness fit together like hand and glove—so much so that he describes pride as the wicked person's ornament, as if it were displayed as a necklace.
In short, pride identifies the wicked; evil people are always proud. They scoff at God's Word, speak against Him, and gossip against fellow man. What we see on the outside is evil attitude and conduct, but what is motivating from the inside is pride. The proud person offends against God by self-exaltation, and he offends others by haughty preoccupation with himself, leading him to rudeness, impatience, and gossip. And all the while, he ignores the instruction from God that would correct him.
All of this is based on a vain delusion of grandeur that, if allowed, can lead to what God prophesies in Obadiah 2-4, 18:
"Behold, I will make you small among the nations; you shall be greatly despised. The pride of your heart has deceived you, you who dwell in the clefts of the rock, whose habitation is high; you who say in your heart, 'Who will bring me down to the ground?' Though you ascend as high as the eagle, and though you set your nest among the stars, from there I will bring you down," says the LORD. . . . "The house of Jacob shall be a fire, and the house of Joseph a flame; but the house of Esau shall be stubble; they shall kindle them and devour them, and no survivor shall remain of the house of Esau. For the LORD has spoken."
He pronounces this against the nation of Edom, but it could be pronounced in principle against anyone who comes to believe and act as though he is invulnerable by ignoring the reality of God and the consequences of sin.