"According to many authors of spiritual books, progress in our life of piety depends a good deal on our recognition and understanding of our dominant defect. This is the defect that has the biggest influence on our behavior and thinking. It typically becomes evident in what we do, what we want, what we think: it can be vanity, laziness, impatience, pessimism, a critical spirit. . . Each person has his or her own path to holiness. Some people require more fortitude. Other need more hope or joy. . . We ought to ask ourselves: What worries us most? What leads us to suffer or lose our peace or fall into sadness? Most of the temptations we experience will be related in some way to this dominant defect. . . Progress in the interior life requires knowledge of this defect."
Francis Fernandez, In Conversation with God, Volume 5, Chapter 23.3.