“When the heart becomes defective and weak, two basic things are involved: corruption of knowledge and corruption of intentions. These in turn lead to two destructive diseases - anger and misguidance. Miguidance is the end result of the corruption of intent. So these two diseases are the rulers of all the afflictions that afflict the heart. The cure lies in guidance based on knowledge. Guidance based on knowledge is in knowing the truth and following it. The entire Qur'an is a cure for these two diseases and others, and it contains perfect guidance.”