"The Pharisee is pious and fervent. He is even grateful. However, he expresses his gratitude from the height of his pedestal. His gratitude gives him one more reason to glorify himself. Not every form of gratitude is accepted by God. Therefore, in its very essence, gratitude must be based on the first pillar - the pillar of contrition. The self-assured Pharisee lacks contrition."  (The Two Pillars, pg. 69)