The word `FOOTSTEP OF SATAN' implies that the evil deeds and deviations from the straight path is not a sudden happening. It rather, occurs gradually and step by step, until its results penetrate deeply in the hearts and minds of people. In other word Satanic Temptations by and by inspire evil suggestions in man, and attract his attention step by step, and therefore the HOLY QURÄN, calls man to be careful and from the first step follow him not.