This verse is general and unspecific, it does not specify in what way they shall be successful, so that each person may find what he wants in it. Its words are few, so that they may be lengthy. For the aim of some of those it is addressing is to be saved from the Fire. Others think only of Paradise. Some desire eternal happiness. Yet others seek only God’s pleasure. While others know their aim and desire to be the vision of God; and so on. In numerous places, the Qur’an leaves the words open in this way, so that they may be general. It leaves things unsaid, so that it can express many meanings. It makes it brief, so that everyone may find his share. Thus, it says, who shall prosper. It does not determine how they shall prosper. It is as if with this omission it is saying: “O Muslims! Good news! O you who fear God! You shall find prosperity through being saved from Hell. O righteous one! You shall find prosperity in Paradise. O you who seeks knowledge of God! You will attain God’s pleasure. O lover of God! You will experience the vision of God.” And so on.
Thus, out of thousands we have offered one example of each of the phrases, words, letters, and omissions demonstrating the comprehensiveness of the Qur’an’s words. You may make analogies and compare its verses and stories with these.
Another example, the verse,
Know then that there is no god but God, and ask forgiveness for your fault.1
This verse contains so many aspects and degrees that all the levels of saints have found their needs from it in all their spiritual journeyings and in all their degrees, and have found spiritual sustenance and a fresh meaning from it appropriate for their own level. For, since the Name of ‘Allah’ is a comprehensive Name, there are aspects of Divine unity within it to the number of the Most Beautiful Names: “There is no provider but Him! There is no creator but Him! There is no merciful one but Him!” And so on.
And, for example, among the stories of the Qur’an, the story of Moses (Peace be upon him) contains thousands of benefits, just like the Staff of Moses. There are numerous aims and aspects in the story, like consoling and comforting the Prophet Muhammad (Peace and blessings be upon him), and threatening the unbelievers, and censuring the dissemblers, and rebuking the Jews. For this reason it is repeated in many Suras. Although it expresses all the aims in every place it is repeated, only one is the main aim and the others are secondary.
If you say: How can we know all the meanings in the examples you have given, which the Qur’an intends and points to?