William Gurnall goes on to remind us that this battle is a costly and painful one: “The Christian is to proclaim and prosecute an irreconcilable war against his [dearest] sins; those sins which have lain nearest his heart, must now be trampled under his feet…Now what courage and resolution does this require? You think Abraham was tried to purpose, when called to take his ‘son, his son Isaac, his only son whom he loved,’ and offer him up with his own hands?.. yet what was that to this? Soul, take your lust, your only lust, which is the child of [your] dearest love, [your] Isaac, the sin which has caused most joy and laughter, from which [you have] promised [yourself] the greatest return of pleasure or profit;.. lay hands on it, and offer it up: pour out the blood of it before me; run the sacrificing knife of mortification into the very heart of it; and this freely, joyfully, for it is no pleasing sacrifice that is offered with a countenance cast down; and all this now, before [you have] one embrace more from it. Truly this is a hard chapter; flesh and blood cannot bear this saying; our lust will not lie [as] patiently on the altar, as Isaac, or as a ‘lamb that is brought to the slaughter…, but will roar and shriek; yea, even shake and rend the heart with their hideous outcries. Who is able to express the conflicts, the wrestlings, the convulsions of spirit the Christian feels, before he can bring his heart to this work?..Now what resolution doth it require to break through such violence and importunity, and notwithstanding all this to do present execution?” The Christian in Complete Armour, 3–4.