Indeed we are not created to worship Allah as an ending target, worshiping is only a mean, a path toward our ending goal. Note the third group in the following quotation:

>  قال اميرالمؤمنين عليه السلام: إنّ‌قوماً عبدوا الله رغبةً فتلك عبادة
> التّجار وإنّ قوماً عبدوا الله رهْبةً فتلك عبادة العبيد وإنّ قوْماً
> عبدوا الله شُكراً فتلك عبادة الأحرار --نهج البلاغه/ حكمت ۲۳۷
>
> Imam Ali --peace be upon him-- has stated: [Among those who worship Allah]
> one group worships Allah in hope [of profit], such is the worship of
> traders; and another group worships Allah out of fear [from His
> Wrath], such is the worship of slaves; and yet another group of people
> worships Allah out of gratitude, such is the worship of free noble
> men. [Nahj al-Balaghah, short saying #237]