The Qur'an speaks of the peope of paradise as "...those who bring to allah sound hearts." (26:87) and the prophet, may Allah bless him peace, said in a famous hadith. "There is a piece of flesh in the body, the nature of which is that when it is sound, the entire body is sound, and when it is corupt, te entire body is corrupt, the entire materialistic values it is often forgotten by Muslims as well as the non-Muslims She end the only truly valilabl*ffpossesswaVisfa pure heart. The eminent Muslim scholar Yass« Roshdy takes the opportunity in this small book to remind us of this vital fact of human existence. Basing himself firmly on the Book and Sunna. He looks at the heart and its window onto the world, the tongue; analyses the defects to which they are subject; and shows us how to avoid these dangers and purify ourselves. In so doing he provides us with an essential key to success in both this world and the Next.