The mistake is, that some indeed wish to become saints, but after their own fashion; they would love Jesus Christ, but in their own way, without forsaking those diversions, that vanity of dress, those delicacies in food : they love God, but if they do not succeed in obtaining such or such an office, they live discontented; if, too, they happen to be touched in point of esteem, they are all on fire; if they do not recover from an illness, they lose all patience. They love God; but they refuse to let go that attachment for the riches, the honors of the world, for the vainglory of being reckoned of good family, of great learning, and better than others. Such as these practise prayer, and frequent Holy Communion; but inasmuch as they take with them hearts full of earth, they derive little profit. Our Lord does not even speak to them, for he knows that it is but a waste of words.
--St. Alphonsus Liguori, The Holy Eucharist