John Murray, Explaining How Sanctification Works

“God’s working in us is not suspended because we work, nor our working suspended because God works. Neither is the relation strictly one of co-operation as if God did his part and we did ours so that the conjunction or coordination of both produced the required result. God works in us and we also work. But the relation is that because God works we work. All working out of salvation on our part is the effect of God’s working in us not the willing to the exclusion of the doing and not the doing to the exclusion of the willing, but both the willing and the doing. … The more persistently active we are in working, the more persuaded we may be that al the energizing grace and power is of God. … Sanctification is the sanctification of persons and persons are not machines.” (Redemption Accomplished and Applied, pgs. 148-149)