Sin Is Attractive and Discourages Thought

Sin…always comes in an attractive form.  And we are fools enough to look on the surface and to judge by outward appearance and not by the reality itself.

And then another thing sin does — and this is a part of its whole art of deceit — it always discourages thought, it always discourages meditation.  Sin knows that it has only got one hope of succeeding, and that is to play upon your feelings and your desires.  If the mind really begins to operate, sin is finished, and therefore in its subtlety, it plays on the feelings and discourages mind and thought. 

D. Martyn Lloyd-Jones, “Darkness and Light: An Exposition of Ephesians 4:17-5:17,” pg. 137