56. “The person who makes his desire as his god” is the one who becomes the slave of his lusts and desires. As he serves his lust like the one who warships his deity. He becomes as much guilty of shirk as the one who worships an idol. According to a tradition, related by Abu Hurairah, the Prophet (peace be upon him) said: Of all the false gods being worshipped and served instead of Allah, the worst in the sight of Allah is one’s own lust. (Tabarani). For further explanation, see (E.N. 50 of Surah Al-Kahf).
The man who keeps his desires under control, and uses his common sense to make decisions, can be expected to come to the right path by making an appeal to his reason even though he might have been involved in shirk or disbelief. For if he decides to follow the right way, he will remain firm and steadfast on it. On the other hand, the man who is the slave of his own lust, is like a ship without an anchor, who wanders about on any path where his lust leads him to. He is least bothered about the distinction between the right and the wrong, the true and the false, and has no desire to choose one against the other. And, if at all, such a person is persuaded to accept the message of guidance, no one can take the responsibility that he will observe any moral laws.
57. They are only like the cattle because they follow their lusts blindly. Just as the sheep and cattle do not know where their driver is taking them, to the meadow or to the slaughter house, so are these people also following their leaders blindly without knowing or judging where they are being led, to success or to destruction. The only difference between the two is that the cattle have no intelligence and will not be accountable as to the place where they are being taken by the driver. But it is a pity that human beings who are endowed with reason, should behave like cattle; therefore their condition is worse than that of cattle.
Incidentally it should be noted that this passage (verses 43, 44) is not meant to dissuade the Prophet (peace be upon him) from conveying the message to such people, but it is an indirect warning to the disbelievers of the consequences if they continued to behave like cattle .