The Qur'an and Man's destiny

One of the early verses of the Qur’an (Al-Balad or The City) paints a very poor picture of man’s sorry destiny of “ toil and struggle,” with no certainty of success.
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XC: 4 “ Verily We have created
Man into toil and struggle.”

XC: 5 “ Thinketh he, that none
Hath power over him? ”

Even when success is forthcoming, man should refrain from boasting of worldly prosperity and must guard against squandering it in vanity:

XC: 6 “ He may say (boastfully);
Wealth have I squandered
In abundance! ”

The Qur’an reminds man that wealth and abundance come with responsibility:

XC: 7 " Thinketh he that none
Beholdeth him? "

What God bestows on man, He can freely take away. The only certainty in life is surely its uncertainty.