" Cells require oxygen, so we breathe. If we stop breathing, we die. The heart also needs to breathe, and the breath of the heart is none other than the remembrance of God. Without it, the spiritual heart dies. The very purpose of revelation and of scripture is to remind us that our hearts need to be nourished. "

― Hamza Yusuf , Purification of the Heart: Signs, Symptoms and Cures of the Spiritual Diseases of the Heart