Fr Callan and Fr McHugh talk about pride in their work “Moral Theology” (the work has the nihil obstat and imprimatur):
(a) Excessive desire of great deeds is presumption, which attempts to do greater things than one is able to perform (cfr. 1075 sqq.), This happens in conceited persons who overestimate their own abilities, taking on themselves offices for which they are incompetent or exercising powers for which they have no authority; also in vulgar persons who mistake their fortuitous advantages, such as wealth or influence or birth, for character and ability. Presumption is a mortal sin when its cause is a grave sin (e.g., lack of faith) or when its effects are very harmful (e.g., when one who is ignorant presumes to teach or practise medicine, when one who is morally frail presumes to enter occasions of sin). There is no sin if one attempts too much in good faith and from inculpable ignorance.
(b) Excessive desire of honors is ambition, or an inordinate hankering after distinctions and deference. The great of soul desire honors when these are due to their station or when there is a just reason, such as the glory of God or the advantage of the neighbor (Matt., v. 15, 16; Heb., v. 4). The ambitious, on the contrary, seek to be honored beyond their deserts (e.g., when an ignorant man longs for academic degrees, a tyrant wishes to be respected on account of his tyranny, an inferior man seeks to perpetuate himself in temporary elective offices, a rich man or athletic hero expects that he will be revered above those who are eminent for virtue or learning), or they seek honor for its own or their own sake, like the Pharisees who loved the first places at feasts and the first chairs in the synagogues, and salutations in the market place, and to be called by men Rabbi (Matt., xxiii. 7; cfr. I Tim., iii. 1 sqq.; Matt., xx. 25). This sin, being excessive desire of something indifferent, is not per se mortal; but it is made mortal either by a cause that is seriously sinful (e.g., if one’s whole life is but a mad chase for preferments) or by a result that is seriously harmful (e.g., if one commits or is ready to commit serious injustice or uncharitableness to win a coveted dignity). Ambition is cured chiefly by charity, for charity is not ambitious (I Cor., xiii. 5; cfr. Gal., v. 13).
continued….