He that is addicted to fasting thinks himself very devout if he fasts, though his heart be at the same time filled with rancor, and scrupling to moisten his tongue with wine, or even with water, through sobriety, he makes no difficulty to drink deep of his neighbor's blood, by detraction and calumny. Another considers himself devout because he recites daily a multiplicity of prayers, though immediately afterwards he utters the most disagreeable, arrogant, and injurious words amongst his domestics and neighbors. Another cheerfully draws an alms out of his purse to relieve the poor, but cannot draw meekness out of his heart to forgive his enemies. Another readily forgives enemies, but never satisfies his creditors but by constraint. These, by some, are esteemed devout, while, in reality, they are by no means so.
St. Francis de Sales - "Introduction to A Devout Life"