Justification by grace alone through faith alone because of Christ alone does not lead to more sinning. On the contrary, it is the only sure and hopeful base of operations from which the fight against sin can be launched. All the bombers that go out to drop bombs on the strongholds of sin remaining in our lives take off from the runway of justification by faith alone. The missiles that we shoot against the incoming attack of temptation are launched from the base of justification by faith alone. The whole lifelong triumphant offensive called “operation sanctification” – by which we wage war against all the remaining corruption in our lives – is sustained by the supply line of the Spirit that comes from the secure, unassailable home-base of justification by faith alone. And it will be a successful operation – but only because of the unassailable home base. – Dr. John Piper