Are "good" and "evil" simply relative terms?

Once again, T.M. Moore, theologian at the Chuck Colson Center for Christian Worldview, has said a mouthful.  In his recent post, titled "Turning from the Truth," Moore emphasizes the fact that in the post-modern era, we have not only lost any concept of absolute truth, but also we have lost any concept of absolute evil. 

If evil does not exist, then by extension there can be no good, either.  If good and evil are relative terms, they are meaningless terms.  In the post, Moore quotes Andrew DeBlanco, author of  The Death of Satan:

"...if evil, with all the insidious complexity which Augustine attributed to it, escapes the reach of our imagination, it will have established dominion over us all." 

Remember that I have stated time and again that the battleground of the Spiritual War we are in is the human mind?  Well, here is corroboration.  When Satan gets us to believe that neither he nor evil exist, he will have complete dominion over us.

Jesus told us that the truth would set us free. (John 8:32).  He was talking about absolute truth as revealed to us by our heavenly Father in Scripture.  Jesus believed in Satan.  He spent 40 days in the desert with him. It was the truth from Scripture that set Jesus free from Satan. Perhaps, we should take a cue from our Commander-in-Chief, soldier.