The Purpose of Life

The true purpose of this life is laid down for all to see, perfectly and clearly, in both the Qur'an and Sunnah. It is none other than to worship Allah Subhanahu wa Ta'ala alone, implement the true religion of Islam on earth, live life in accordance with his will with the goal of being blessed with entering the gates of Jannah. 

Allah Subhanahu wa Ta'ala says in the Qur'an that:

"I have only created Jinns and men, that they may serve Me." 51:56

He also says that he has given us the gift of Islam whilst on this earth:

"This day have I perfected your religion for you, completed My favour upon you, and have chosen for you Islam as your religion." - 5:3

"The Religion before Allah is Islam (submission to His Will)" - 3:19

He tells us that Islam is for all men

21:106-107 

Given to us by Allah in the Sacred Book of which is perfect

16:89, 17:9, 12:111, 21:106-107, 10:37, 6:114-115

guarded from corruption

56:77-80, 15:9

 through the prophet

61:9, 48:28, 9:33,  21:107

  for alah owns all

2:284

"The Earth belongs to Allah and should be purified for Allah, and it cannot be purified for Him unless the banner "Not god except Allah" is unfurled across the earth." - Shaheed Sayyid Qutb, Ma'alim fi al-Tariiq (Milestones), p16, 1964.

and all deeds done outside of islam, no matter how good you think you are are not worthy
18:103-108,

The Messenger of God (may peace be upon him) said: "A person may be doing the deeds of the people of Paradise so far as society can see, while actually being one of the people of Hellfire. And a person may be doing the deeds of the people of Hellfire so far as society can see, while actually being one of the people of Paradise." - Taken from the book "The Wisdom of the Prophet", a selection from the Hadith translated by Thomas Cleary

Islam will dominate
61:9, 48:28, 9:33, 8:39, 2:143

even though the kaffirs would try to stop it
9:32, 

but we will invite

16:125

we must fight tyranny
4:75, 2:190-194

speak out

2:42, 2:283, muslim, book 1, no. 0075

we cannot be beaten
41:141, 4:141, 37:173

for allah is our protector
2:257, 4:171, 4:45

and he is all we need
8:64

even if it is hard
3:146

for he is with me when I seek help
2:153

fear allah
3:131-132

He tells us also numerous times that this life is temporary and a test to see if you live in accordance with how he has given us the purpose of living:

"O my people! This life of the present is nothing but (temporary) convenience: It is the Hereafter that is the Home that will last." - al-Ghafir, 40:39 (Interpretation of Meaning, al-Qur'an)

2:286, 5:48, 87:16-17, 57:20, 23:115, 3:185, 21:35, 62:8, 9:38, 67:1-2, 10:63-64, 2:36, 42:36

like something bad for you

2:216

And if we succeed in following the true way we will be blessed with Jannah:

"... for a Garden whose width is that (of the whole) of the heavens and of the earth, prepared for the righteous"... "for Allah loves those who do good;" - 3:133-134

But if we fail, Hellfire:

"As to those who are rebellious and wicked, their abode will be the Fire: every time they wish to get away therefrom, they will be forced thereinto, and it will be said to them: "Taste ye the Penalty of the Fire, the which ye were wont to reject as false." - 32:20

"... fear the Fire whose fuel is men and stones,- which is prepared for those who reject Faith." - 2:24

42:42

Islam is for all time
2:2, 6:19

Change your soul
3:11

and you should believe in it all
2:85, 2:208

and judge by allah unless be a kafir
5:44, 45, 47, 48

wont find believer friends with kuffar
58:22

and if satan tempts you be strong and seek allah
7:200-201

and allah loves that that do good
3:134

And remember
4:135 and 4:136

Because all honur is with allah
4:139

believe in some parts:

2:85, 2:208

other

13:28

Volume 9, Book 92, Number 384:

Narrated Abu Huraira:

Allah's Apostle said, "All my followers will enter Paradise except those who refuse." They said, "O Allah's Apostle! Who will refuse?" He said, "Whoever obeys me will enter Paradise, and whoever disobeys me is the one who refuses (to enter it)."

So take what the Messenger assigns to you, and deny yourselves that which he withholds from you. And fear Allah. for Allah is strict in Punishment. (59:7)