The second danger threatens those who accept the opinions of the philosophers. When, for instance, we read the "Treatise of the Brothers of Purity," and other works of the same kind, we find in them sentences spoken by the Prophet and quotations from the Sufis. We approve these works; we give them our confidence; and we finish by accepting the errors which they contain, because of the good opinion of them with which they have inspired us at the outset. Thus, by insensible degrees, we are led astray. In view of this danger the reading of philosophic writings so full of vain and delusive utopias should be forbidden, just as the slippery banks of a river are forbidden to one who knows not how to swim. The perusal of these false teachings must be prevented just as one prevents children from touching serpents. A snake-charmer himself will abstain from touching snakes in the presence of his young child, because he knows that the child, believing himself as clever as his father, will not fail to imitate him; and in order to lend more weight to his prohibition the charmer will not touch a serpent under the eyes of his son.
Such should be the conduct of a learned man who is also wise. But the snake-charmer, after having taken the serpent and separated the venom from the antidote, having put the latter on one side and destroyed the venom, ought not to withhold the antidote from those who need it. In the same way the skilled coin-assayer, after having put his hand in the bag of the false coiner, taken out the good coins and thrown away the bad ones, ought not to refuse the good to those who need and ask for it. Such should be the conduct of the learned man. If the patient feels a certain dislike of the antidote because he knows that it is taken from a snake whose body is the receptacle of poison, he should be disabused of this fallacy.
If a beggar hesitates to take a piece of gold which he knows comes from the purse of a false coiner, he should be told that his hesitation is a pure mistake which would deprive him of the advantage which he seeks. It should be proved to him that the contact of the good coins with the bad does not injure the former and does not improve the latter. In the same way the contact of truth with falsehood does not change truth into falsehood, any more than it changes falsehood into truth.
Thus much, then, we have to say regarding the inconveniences and dangers which spring from the study of philosophy.
Sufism
When I had finished my examination of these doctrines I applied myself to the study of Sufism. I saw that in order to understand it thoroughly one must combine theory with practise. The aim which the Sufis set before them is as follows: To free the soul from the tyrannical yoke of the passions, to deliver it from its wrong inclinations and evil instincts, in order that in the purified heart there should only remain room for God and for the invocation of his holy name.
As it was more easy to learn their doctrine than to practise it, I studied first of all those of their books which contain it: "The Nourishment of Hearts," by Abu Talib of Mecca, the works of Hareth el Muhasibi, and the fragments which still remain of Junaid, Shibli, Abu Yezid Bustami, and other leaders (whose souls may God sanctify). I acquired a thorough knowledge of their researches, and I learned all that was possible to learn of their methods by study and oral teaching. It became clear to me that the last stage could not be reached by mere instruction, but only by transport, ecstasy, and the transformation of the moral being.
To define health and satiety, to penetrate their causes and conditions, is quite another thing from being well and satisfied. To define drunkenness, to know that it is caused by vapors which rise from the stomach and cloud the seat of intelligence, is quite a different thing to being drunk. The drunken man has no idea of the nature of drunkenness, just because he is drunk and not in a condition to understand anything, while the doctor, not being under the influence of drunkenness, knows its character and laws. Or if the doctor fall ill, he has a theoretical knowledge of the health of which he is deprived.
In the same way there is a considerable difference between knowing renouncement, comprehending its conditions and causes, and practising renouncement and detachment from the things of this world. I saw that Sufism consists in experiences rather than in definitions, and that what I was lacking belonged to the domain, not of instruction, but of ecstasy and initiation.
The researches to which I had devoted myself, the path which I had traversed in studying religious and speculative branches of knowledge, had given me a firm faith in three things—God, Inspiration, and the Last Judgment. These three fundamental articles of belief were confirmed in me, not merely by definite arguments, but by a chain of causes, circumstances, and proofs which it is impossible to recount. I saw that one can only hope for salvation by devotion and the conquest of one's passions, a procedure which presupposes renouncement and detachment from this world of falsehood in order to turn toward eternity and meditation on God. Finally, I saw that the only condition of success was to sacrifice honors and riches and to sever the ties and attachments of worldly life.