Sin also carries on its war by entangling the affections [desires] and drawing them into alliance against the mind [our reason]. Grace may be enthroned in the mind, but if sin controls the affections, it has seized a fort from which it will continually assault the soul. Hence, as we shall see, mortification is chiefly directed to take place upon the affections.
– John Owen
as quoted by Bridges, Jerry; The Disciplined of Grace:God’s Role and Our Role in the Pursuit of Holiness; NavPress; Colorado Springs; copyright 1994; p.