﴾Truly, We did offer Al-Amanah (the trust or moral responsibility or honesty and all the duties which Allah has ordained) to the heavens and the earth, and the mountains, but they declined to bear it and were afraid of it (i.e. afraid of Allah's Torment). But man bore it. Verily, he was unjust (to himself) and ignorant (of its results).﴿

[Al-Ahzab, 72]

 It is also a fact that man is the honored creature. Allah says:

﴾And indeed We have honoured the Children of Adam, and We have carried them on land and sea, and have provided them with At-Taiyibat (lawful good things), and have preferred them above many of those whom We have created with a marked preference.﴿

[Al-Isra', 70]

 Allah says in another Ayah:

﴾And has subjected to you all that is in the heavens and all that is in the earth; it is all as a favour and kindness from Him. Verily, in it are signs for a people who think deeply.﴿

[Al-Jathiyah, 13]

 One more-self-evident fact is that the one to whom everything is subjugated ranks over whatever is subjugated to him. Furthermore, man is the creature who is assigned to worship Allah. Allah says:

﴾And I (Allah) created not the jinns and humans except they should worship Me (Alone).﴿

[Adh-Dhariyat, 56]

 Worship by definition is to know Allah first, to obey Him second and to acquire happiness by drawing close to Him (as a result of obeying Him). In other words, there are three major matters in Islam; the first one is about knowledge, the second is about reacting properly and the third is the amazing outcome of the reaction. Knowledge is what causes the reaction, whereas the outcome is the effect of such a reaction. Accordingly, after you get acquainted with Allah, you obey Him, and as a result you will gain happiness in being close to Him in the worldly life and in the Hereafter.

 Allah commands us to purify our souls, and the path to do so is to get this soul acquainted with its Lord, to force it to obey Him and to bring it closer to Him. By doing so, we will be fulfilling the purpose of our existence due to the following Ayah:

﴾Indeed whosoever purifies himself (by avoiding polytheism and accepting Islamic Monotheism) shall achieve success,﴿

[Al-A'la, 14]

 Prosperity, success, triumph and excellence are achieved by purifying the soul since Allah the Almighty says:

﴾The Day whereon neither wealth nor sons will avail* Except him who brings to Allah a clean heart [clean from Shirk (polytheism) and Nifaq (hypocrisy)].﴿

[Ash-Shu'ara', 88-89]

 He comes to Allah with a pure flawless and spotless soul, which deserves to be admitted to Allah's Paradise for eternity. Hence, man is prepared in the worldly life for a sublime honoring life as we live in the abode of toil(i.e. worldly life):

﴾O man! Verily, you are returning towards your Lord with your deeds and actions (good or bad), a sure returning, so you will meet (i.e. the results of your deeds which you did).﴿

[Al-Inshiqaq, 6]

 The Hereafter is the abode of honoring; Allah says:

﴾There they will have all that they desire, and We have more (for them, i.e. a glance at the All-Mighty, All-Majestic).﴿

[Qaf, 35]

 Abu Huraira narrated that the Prophet PBUH said that Allah said in Qudsi Hadith:

((I have prepared for My pious servants which no eye (has ever) seen, no ear has (ever) heard and no human heart has ever perceived, leaving apart (those bounties) about which Allah has informed you.))

[Al-Bukhari, Muslim, At-Tirmizi and Ahmad]

 Allah has assigned us to purify our souls, to get acquainted with Him and to worship Him after He gave us the means of purification and knowledge.