The key to the Dar Al -Saada and the publication of the mandate of science and the will is a book in happiness in science, written by Ibn Qayyim al -Jawziya, the author dealt in his book, will and knowledge and made them a key to everything that is useful in life and a tool that opens the door of happiness and reveals the greatness of the innocent and his creation and indicates the path of truth and goodness. Ibn Qayyim al -Jawziyyah has exacerbated in the hadith about happiness in knowledge and will and the wisdom in creating man, the universe, planets, stars, sky and earth, and about the need of people to Sharia and refer to talking about optimism, pessimism, birds, infection and its types, and explaining the correct judgment in that from the Holy Qur''an and the Sunnah of the Prophet and indicated the need of people to Sharia and touched on talking about optimism, pessimism, birds, infection, and its types.
