"If a man allows a love of anything or anyone to come between himself and Allah..."

If a man allows a love of anything or anyone to come between himself and Allah, then he has worshipped that thing. In this way, money can become one's god or even one's desires could become god. 

The Prophet (peace be upon him) said, "The worshipper of dirham (money) will always be miserable", (reported by Anas and collected by Bukhari).

And Allah 'Azza wa jal said in the Qur'an,
"Have you not seen the one who takes his desires as his god?.." (Qur'an 25:43)


(Taken from "The Fundamentals of Tawheed" by Dr Abu Ameenah Phillips)