by Robert Barclay, An Apology for the True Christian Divinity… (1678)
“ Lastly, They object, That if perfection or freedom from sin be attainable, this will render mortification of sin useless, and make the blood of Christ of no service to us, neither need we any more pray for forgiveness of sins. [Answ. Who fights and not in hopes to overcome his foe?] I answer, I had almost omitted this objection, because of the manifest absurdity of it: for can mortification of sin be useless, where the end of it is obtained? seeing there is no attaining of this perfection but by mortification. Doth the hope and belief of overcoming render the fight unnecessary? ”
