Rather, behind these same expressions and within these same meanings there are deeper and wider levels of meaning which only the spiritual elite who possess pure hearts can comprehend. The Prophet, who is the divinely appointed teacher of the Quran, says: "The Quran has a beautiful exterior and a profound interior." He has also said, "The Quran has an inner dimension, and that inner dimension has an inner dimension up to seven inner dimensions." Also in the sayings of the imams there are numerous references to the inner aspect of the Quran. The main support of these assertions is a symbol which God has mentioned in Chapter XIII, verse 17, of the Quran. In this verse divine gifts are symbolized by rain that falls from heaven and upon which depends the life of the earth and its inhabitants. With the coming of the rain, floods begin to flow and each river bed accepts a certain amount of the flood, depending on its capacity. As it flows, the flood is covered with foam, but beneath the foam there is that same water which is life-giving and beneficial to mankind.
As is indicated by this symbolic story, the capacity for comprehension of divine sciences, which are the source of man’s inner life, differs among people. There are those for whom there is no reality beyond physical existence and the material life of this world which lasts but a few days. Such people are attached to material appetites and physical desires alone and fear nothing but the loss of material benefits and sensory enjoyment. Such people, taking into consideration the differences of degree among them, can at best accept the divine sciences on the level of believing in a summary fashion in the doctrines and performing the practical commands of Islam in purely outward manner without any comprehension. They worship God with the hope of recompense or fear of punishment in the next world.
There are also those who, because of the purity of their nature, do not consider their well-being to lie in attachment to the transient pleasures of the fleeting life of this world. The losses and gains and bitter and sweet experiences of this world are for them no more than an attractive illusion. Memory of those who passed before them in the caravan of existence, who were pleasure-seekers yesterday and no more than subjects of stories today, is a warning that is continuously present before their eyes. Such men who possess pure hearts are naturally attracted to the world of eternity. They view the different phenomena of this passing world as symbols and portents of the higher world, not as persisting and independent realities.
It is at this point that through earthly and heavenly signs, signs upon the horizons and within the souls of men,19 they "observe" in a spiritual vision the Infinite Light of the Majesty and Glory of God. Their hearts become completely enamored with the longing to reach an understanding of the secret symbols of creation. Instead of being imprisoned in the dark and narrow well of personal gain and selfishness they begin to fly in the unlimited space of the world of eternity and advance ever onwards toward the zenith of the spiritual world. When they hear that God has forbidden the worship of idols, which outwardly means bowing down before an idol, they understand this command to mean that they should not obey other than God, for to obey means to bow down before someone and to serve him. Beyond that meaning they understand that they should not have hope of fear of other than God; beyond that, they should not surrender to the demands of their selfish appetites; and beyond that, they should not concentrate on anything except God, May His Name be Glorified.