Just as a believer must learn about the truth and the avenues of goodness from the obligations and recommended actions and deeds in order to preform them, likewise one must be diligent to learn about falsehood, misguidance and that which is impermissible and disliked in order to leave it and avoid it upon clarity. In this book we study many of the major sins in detail to be aware of them and remember the dangers of sin and transgression. As some of the previous scholars have mentioned:كيف يتقي من لا يدري ما يتقي؟How can one keep away from something if he does not know what to keep away from?