chief

40. It may be said that humility is the most efficacious remedy for all evil and a most potent antidote to preserve the soul from that death and guilt which leads to everlasting perdition. And yet it is this virtue which we neglect most of all.
O my soul, God, Who Himself desires thine eternal salvation, desires also that thou shouldst acquire it through humility; "And humility goeth before glory"; [Prov. xv, 33] therefore bow down and adore His sovereign Will. When we say the "Our Father," let us meditate upon that petition, in which we ask that the Will of God may be done, and let us apply that prayer to our own needs: O my God, since Thou desirest that I should be humble, "Thy Will be done." Thy Will is done in Heaven by all those blessed Spirits who worship Thee with profound humility; may Thy Will be done by me also! "Thy Will be done on earth, as it is Heaven." And in the same way let us apply the last petition to ourselves also, saying: "And deliver us from evil," praying God to deliver us and preserve us from pride, which is the worst of all evils, if indeed it may not be called the greatest of all sins; for St. Augustine, inquiring into which sin King David desired most to be delivered from when he said, " I shall be cleansed from the greatest sin," [Ps. xviii, 14] answers that this sin was pride, for pride is the greatest of all sins, because it is the chief of all sins and the cause and origin of them all: "This I take to be pride, which is the chief and cause of every sin." [Enarr. in Ps. xviii]