Surat al Saffat 41:44

وَلَوْ جَعَلْنَاهُ قُرْآنًا أَعْجَمِيًّا لَّقَالُوا لَوْلَا فُصِّلَتْ آيَاتُهُ أَأَعْجَمِيٌّ وَعَرَبِيٌّ قُلْ هُوَ لِلَّذِينَ آمَنُوا هُدًى وَشِفَاء وَالَّذِينَ لَا يُؤْمِنُونَ فِي آذَانِهِمْ وَقْرٌ وَهُوَ عَلَيْهِمْ عَمًى أُوْلَئِكَ يُنَادَوْنَ مِن مَّكَانٍ بَعِيدٍ

"Had We made it a Qur'an in indistinct and inexpressive language, these (faultfinders) would have surely said, `Why has not (the subject matter of) its verses been made clear in exposition?' What! can indistinct and inexpressive language and an eloquently clear language (be one and the same thing). Say, `It is a wonderful guidance and healing to those who believe.' But (as to those) who do not believe there is deafness in their ears and this (Qur'an) is obscure to them (with regard to its truth). And they are (as if to say) being called to from a place afar.
Ayatullah Hajj Muhammad Hussein al Husseini al Teharani
The Qur'an can be studied in many ways, its grammatical structure, its scientific findings, its poetry...one can gather such knowledge as one can using one's senses and intellect and still be as far from the true Knowledge that is in the Qur'an as the heavens are from earth. In order to see the Face of Allah reflected in each of the verses of the Qur'an, one has to abandon all earthly intentions..... 
What is other than Allah is a veil; the complete knowledge of Allah is predicated upon the dissolution of veils, as has been versed by Qays bin Mallouh al 'Amiri who spoke thus of his longing for Layla Al Amiriayat:

تَمَنَّيْتُ مِنْ لَيْلَي‌ عَلَی‌ البُعْدِ نَظْرَةً         لِيُطْفَي‌ جَويً بَيْنَ الحَشا وَالاَضالِعِ

 فَقالَتْ نِسَاءُ الحَي‌ّ تَطْمَعُ أنْ         تَرَي‌ بِعَيْنَيْكَ لَيْلَي‌ مُتْ بِداءِ المَطامِعِ

 وَكَيْفَ تَرَي‌ لَيْلَي‌ بِعَيْنٍ تَرَي‌         بِها سِواها وَما طَهَّرْتَها بِالمَدامِعِ

 وَتَلْتَذُّ مِنْها بِالحَديثِ وَقَدْ جَرَي‌             حَديثُ سِـواها في‌ خُروقِ المَسـامِعِ

I have hoped for a look at Layla from a distance.
A look to put out the fires raging between my inners and my ribs.

The area women deride,

“If you desire to see Layla with your own eyes, 
you will succumb to this illness of desire.

For how can you see Layla with an eye that sees others,

an eye that you have not purified with flowing tears?

And how can you delight in her talk

when the talk of others has passed through the inlets of your ears?"

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It is not possible for the one who has found companionship in other than Allah, one who has harbored goals other than Allah, and intentions other than His praise- one who has desires from this lower life (al-Dunya)- it is not possible for such a person to meet Allah and be honored by His Sight.


Adapted from : Kitab Maarifat Allah-.Volume 1, Section 5
http://www.maarefislam.org/doreholomvamaarefislam/bookscontent/allahshenasi-arabic/allah1/allah1.5.htm