There is a negative force that is called satan but it's effect is weak. The important thing is that if we use our good conscience, if we use our mind, Allah constantly reveals in our conscience. For instance when we do something, if it is wrong, it comes to us as knowledge; it is revealed to us. It is inspired in our hearts. If we resist that knowledge, we would be acting conscienceless. If we do not resist it and act on it, we would be acting in compliance with our good conscience. - Harun Yahya