The following is the translation of a chapter from the Arabic book 'Al-Fikr al-Islami' (The Islamic Thought) by Sheikh Mohammad Mohammad Ismael Abduh, an Assistant Professor at the Egyptian University (now known as Cairo University) in the past. The instinct is different from the organic need, though each of them is natural life energy. The organic need requires inevitable satisfaction, and man dies if it is not satisfied. This is different to the instinct, which only requires satisfaction; and if it was not satisfied; man becomes worried, but he does not die, he rather remains alive. So, if man did not eat or answer his natural call he dies, but if he did not satisfy his instinct he does not die. If he did not have a sexual communication with a woman or did not pray he does not die, because the instinct does not need inevitable satisfaction. Moreover, the organic need is agitated for satisfaction from inside by itself, and it is stirred for satisfaction from outside. This
"Thoughts are the greatest wealth of any nation."