Of course, none of us is capable of running swiftly on the right course while we remain in the earthly confinement of our bodies. Indeed, most of us are so oppressed with weakness that we make little progress – staggering, limping, and crawling on the ground. But let us move forward according to the measure of our resources and pursue the path we have begun to walk. None of us will move forward with so little success that we will not make some daily progress in the way. Therefore, let us keep trying so that we might continually make some gains in the way of the Lord, and neither let us despair over how small our successes are. For however much our success fall short of our desire, our efforts aren’t in vain when we are farther along today than yesterday. So let us fix our eyes on the goal with sincerity and simplicity, aspiring to that end – neither foolishly congratulating ourselves, nor excusing our evil deeds. Let us press on with continual striving toward that goal so that we might surpass ourselves – until we have finally arrived at perfection. This, indeed, is what we follow after all our lives, but we will only possess it when we have escaped the weakness of the flesh and have been received into His perfect fellowship.
John Calvin, A Little Book on the Christian Life (pgs. 16-17)