Pride is esteeming ourselves above others, hence more important and significant. It often appears in a moral context, where we believe we’re not as bad as someone else, judging the moral condition of another’s heart; something God forbids.
Attributing significance or value to a human being is something only God can do, and He’s already attributed infinite value and significance to every one of us: God so loves us that He’s willing to die, to lay down His own life, for every human soul. Every time we rank each other in importance we dismiss God’s heart, trampling Him underfoot.
And we’re doing this nearly constantly, imposing our broken little value systems, or cowing to others in theirs, while God looks down in grief, sorrow, and anger. If we’re not seeking His face, we’re entirely unaware, heedless of the wrath we’re treasuring up for ourselves. (Ro 2:5)
The love of God is what makes pride so incredibly awful, and moves God to such fury as we disvalue those He loves. He hates the very traces of pride in our faces (Pr 6:16); it’s right up there with murder.
Yet when most of us focus on God’s love, I’m afraid that we’re only thinking of His love for us, and not for everyone else. Rather than comforting us, the fact that we’re so deeply and thoughtlessly contrary to His passion for us all should terrify us. (2Co 5:11)
The pride of life isn’t of the Father; it’s of the world (1Jn 2:16), and it’s wickedness. (1Jn 5:19) He tells us to humble ourselves, to esteem others better than ourselves, so He will not have to oppose us, and He can give us grace.