The Essence of Islam – Volume II — Page 166
166. Essence of Islam II on the heart of the Holy Prophet (peace and blessings of. Allāh be on him). But the difference between the two revelations is like the difference in the reflection in the mirror of the ring and in a large mirror. Though it is the same Gabriel and he has the same effects yet not all matter that is affected has the same extent and the same clearness. . The difference of the effects of Gabriel is not only in their quantity but is also with regard to their quality. That is to say, the purity of heart which is the condition of reflection is not of the same degree in all recipients of revelation. As you can observe not all mirrors possess the same degree of transparency. Some are so clear and bright that the reflection of the beholder is seen in its perfection in them, and some are so opaque and dusty and smoky that the reflection cannot be seen clearly in them. Indeed, some are so distorted that if the lips are visible in the reflection the nose is not, and if the nose is visible the eyes are not. The same is the case with the mirrors of the hearts. In a heart that is of the utmost purity the reflection is very clear and in a heart which is dusty, to some degree, the reflection is also vague to the same degree. This purity was possessed to a complete and perfect degree by the heart of the Holy Prophet (peace and blessings of Allāh be on him); no other heart possessed such purity. [Tauḍīḥ-e-Marām, Rūḥānī Khazā'in, vol. 3, pp. 85-88]. I wonder at the intelligence of people who consider the mediation of vapours as essential for rain which comes down from the clouds and deem it impossible for rain to descend without clouds, but for the rain of revelation which falls upon pure hearts, they laugh out of their ignorance at the mediation of angels which is essential