Certainty and doubt 

are the Devil's greatest weapons.

The Devil is certain of this 

and has no doubt they will work on you.

To defeat the Devil, 

one must neither doubt or be certain.

To do this, one needs to become one's own Devil.

When you accomplish this, 

when you integrate the shadow of this place within you, 

suddenly the Devil's own tactics

are never certain and remain forever in doubt.

Then you will find, like the Devil, 

ways to be certain and times when you're never in doubt.

But beware, for it's at these precise times

when certainty and doubt work on you,

they are working like they work for the Devil.

To defeat one's own folly,

one must neither doubt or be certain

of doubting or being certain.