"One of the enemy's favorite tactics is to question the Word of God and undermine your faith. 'Has God indeed said...' is his usual approach (Gen. 3:1). Satan knows that once you start questioning God's Word, the next step is to deny God's Word; and that opens the way for him to substitute one of his own lies."- Warren Wiersbe
Wiersbe, Warren W. On Being A Servant of God. Nashville: Thomas Nelson, Inc., 1993. Pg. 108.