The Accuser and the Defender

Before we sin, Satan is always our defender, and Christ is the accuser. Satan is the defender: 'Sure, the Vatican Council changed all that. We don't believe that any more; do you? After all, you've got to be up-to-date.' Christ seems to be saying, 'Choose either me or the world. I pray not for the world.' Then after we sin, what is Satan called in the book of Revelation? The accuser. That's what he is in the book of Job and in Zechariah. 'Now see what you've done. No hope, you might just as well go all the way.'  And Christ is now the defender. 'Come to me, all ye who labor.'  'Though your sins be as scarlet, they shall be made white as snow.'