The Essence of Islam – Volume II — Page 31
2. REVELATION, INSPIRATION,. VISION AND DREAM. I tell you truly that every door can be closed but the door of the descent of the Holy Spirit is never closed. Open the doors of your hearts so that it might enter into them. *******. There is no safeguarding law through following which we can secure ourselves absolutely against mistakes. . That is the reason why the philosophers, who framed the rules of logic and invented the methods of discussion and built the arguments of philosophy, fell continuously into error. They left as the legacy of their ignorance hundreds of false notions and mistaken philosophies and vain discourses. This shows that it is impossible to arrive at the truth of every matter and to determine the correct doctrines as the result of one's own research without making a mistake. We have never known any individual, nor heard of one or read of one in any book of history, who was free from error in the whole field of his vision and reflection. It follows, therefore, that it is basically impossible to find people who, through the study of the laws of nature and squaring their conscience with the circumstances of the world, carried their research to the highest level of truth, without any possibility of mistake. . . . . Obviously, if man cannot escape error through his own knowledge and if God (Who is Gracious and Merciful, 31