My apologies if this posted in the wrong place!
And sorry for such a dark topic three weeks before Christmas…
I am unaware that there is an official Church teaching on this; please enlighten me if there is.
C.S. Lewis makes a very good for case in Mere Christianity that pride is the worst sin. (See chapter 8, “The Great Sin”: docs.google.com/document/d/1ENwsg4McrcI-l9w_KH_JrzfWkxfC2S3fZjY5lxiuZKw/edit?hl=es&pli=1) It was after all it was the first sin of Lucifer and the cause of his fall, and all other sins came about as a result of it. Surely it represents putting the self before others and ultimately God in the “purest” form. However, pride numbers neither among sins that cry to Heaven for vengeance nor among sins against the Holy Spirit. Moreover, it’s opposite, humility, is not the greatest virtue (although that would be ironic :D), love is.
Love is undoubtedly the greatest gift of God; this can be seen throughout the Bible, possibly the most famous example being 1 Corinthians 13 (beginning with: “If I speak in human and angelic tongues but do not have love, I am a resounding gong or a clashing cymbal.” And ending with: “So faith, hope, love remain, these three; but the greatest of these is love.”)
The opposite of love is indifference, or more precisely, utilitarianism–as Blessed John Paul II stated in the Theology of the Body. Giving up one’s own good for the good of others–the ultimate form of this is self-sacrifice–is the best expression of love. Conversely, to use someone else for one’s own benefit–the ultimate form of this is murder for personal gain–is the "best " expression of the opposite of love. Most crucially, if you think about it, the four sins that cry to Heaven for vengeance: murder, sodomy, oppression of the poor, and defrauding workers of their just wages, all express utilitarianism in its most absolute form.
So which is worse: absolute pride or absolute utilitarianism? I’m leaning towards the latter, but am unsure.
As a third possibility, must both necessarily include the other?
Either way, may God keep you from both, and grant you both love and humility.