The following is the translation of a chapter from the Arabic book 'Al-Fikr al-Islami' (The Islamic Thought) by Sheikh Mohammad bin Mohammad Ismael Abduh, an Assistant Professor at the Egyptian University (now known as Cairo University) in the past. Fear is one of the external appearances of the survival instinct. Its existence in man is inevitable because it is a part of his creation and it existed in him naturally with his creation. However, it is like other external appearances of the survival instinct such as sovereignty, defence, and compassion and others, even like those of other instincts, which are the religiousness and reproduction; it does not appear unless there is a motive. If there is no such motive, fear will not appear at all. This motive, which provokes fear, is the same like any other motive that provokes any of the instincts. It is either a tangible physical thing, or a thought that is connected with it or related to it. However, this physical tangible thing
"Thoughts are the greatest wealth of any nation."