The Beginning of Warfare - John Owen

To labour to be acquainted with the ways, wiles, methods, advantages and occasions of (sins) success, is the beginning of warfare. So do men deal with enemies. They inquire out their counsels and designs, ponder their ends, consider how and by what means they have formerly prevailed, that they may get the start of them.

Taken from the book The Mortification of Sin by John Owen 1656