Our disability to answer the mind and will of God, in all or any of the obedience that he requires, is in him only to be discovered. This, indeed, is a thing that many will not be acquainted with to this day. To teach a man that he cannot do what he ought to do, and for which he condemns himself if he do it not, is no easy task. Man rises up with all his power to plead against a conviction of impotency. Not to mention the proud conceits and expressions of the philosophers, how many that would be called Christians do yet creep, by several degrees, in the persuasion of a power of fulfilling the law!
– John Owen –