When pride takes hold of a soul, it is no surprise to find it bringing along with it a whole string of other vices: greed, self-indulgence, envy, injustice. The proud man is always vainly striving to dethrone God, who is merciful to all his creatures, so as to make room for himself and his ever cruel ways.
We should beg God not to let us fall into this temptation. Pride is the worst sin of all, and the most ridiculous. If, with its multiple delusions, it manages to get a hold, the unfortunate victim begins to build up a facade, to fill himself with emptiness, and becomes conceited like the toad in the fable which, in order to show off, puffed itself up until it burst. Pride is unpleasant, even from a human point of view. The person who rates himself better than everyone and everything is constantly studying himself and looking down on other people, who in turn react by ridiculing his foolish vanity. (Friends of God, 100)