D&C 10

 The Savior explained concerning the wicked - 

"Verily, verily, I say unto you, that Satan has great hold upon their hearts; he stirreth them up to iniquity against that which is good;

21 And their hearts are corrupt, and full of wickedness and abominations; and they love darkness rather than light, because their deeds are evil; therefore they will not ask of me.

22 Satan stirreth them up, that he may lead their souls to destruction.

23 And thus he has laid a cunning plan, thinking to destroy the work of God; but I will require this at their hands, and it shall turn to their shame and condemnation in the day of judgment.

24 Yea, he stirreth up their hearts to anger against this work.

25 Yea, he saith unto them: Deceive and lie in wait to catch, that ye may destroy; behold, this is no harm. And thus he flattereth them, and telleth them that it is no sin to lie that they may catch a man in a lie, that they may destroy him.

26 And thus he flattereth them, and leadeth them along until he draggeth their souls down to hell; and thus he causeth them to catch themselves in their own snare.

27 And thus he goeth up and down, to and fro in the earth, seeking to destroy the souls of men."  (Doctrine and Covenants 10:20–27)

In my mind, this is obvious every day.