This is because the soul necessarily seeks and desires something by virtue of its innate nature. Having a will is essential to its very being: a human soul cannot be conceived of as devoid of will. Hence the Prophet, may Allah bless him and grant him peace, said:

“The truest names are al-Hārith and Hammām.”

The soul is an animate being, and every animate being moves by will; it must therefore engage in voluntary movement. Since this is so, everyone who wills must will something. What is willed is sought either for its own sake or for the sake of something else. Whatever is sought for something else must ultimately lead to something sought for its own sake. It is therefore impossible for everything that is willed to be sought for something else, since this would entail an infinite regress of final causes. This is impossible, just as an infinite regress of efficient causes is impossible—indeed, even more so.

Since a human being must have something that he seeks for its own sake, this is the god that his heart worships.

Thus every servant must have a god, and it follows that the servant is innately disposed to love his god.

It is impossible, however, for him to be innately disposed to worship anything other than Allah, for several reasons:

First, this is contrary to reality.

Second, one created being has no greater claim than another to be the god of all creation.

Third, the polytheists have not agreed upon a single god; rather, each people has worshipped whatever it deemed pleasing.

Fourth, if that created being is dead, the living are more perfect than the dead, so it is impossible for people to be innately disposed to worship something dead. If it is alive, it too has a will, and therefore has a god that it worships. If this one worshipped that one, and that one worshipped this one, this would entail an impossible circularity or an impossible infinite regress. They must therefore all have a god whom they worship.