From there

Who truly knows himself? Who can trust what is concealed in his soul, and what is concealed in his conscience? Who can direct his whims, inclinations, emotions, and desires properly? Who can truly reconcile himself with his duty? Shouldn't the correct action of something be the result of correct knowledge of this thing? Wouldn't it be possible for you, if you do something with true knowledge, to avoid error and avoid misguidance? indeed! But correct knowledge of things is not easy and is not available to you all the time. Don't you see how people's opinions change in comparison to ordinary things? They see them as good, then they see them as evil, then they hesitate again, and then they suffer from a kind of neglect and indifference, which is an admission of inability to understand things and know their truths? True knowledge of things is not easy, and as a result people are involved in mistakes and flounder in darkness. The matter does not stop at people's ignorance of the facts of things, but rather it goes beyond it to what is worse than it, for you do not know your friend as you should know him, and you do not identify an intruder from your mix and your clan as you should identify them. Taha Hussien