Therefore, while we all labour naturally under the same disease, those only recover health to whom the Lord is pleased to put forth his healing hand. The others whom, in just judgement, he passes over, pine and rot away till they are consumed. And this is the only reason why some persevere to the end, and others, after beginning their course, fall away. Perseverance is the gift of God, which he does not lavish promiscuously on all, but imparts to whom he pleases. If it is asked how the difference arises – why some steadily persevere, and others prove deficient in steadfastness, we can give no other reason than that the Lord, by his mighty power, strengthens and sustains the former, so that they perish not, while he does not furnish the same assistance to the latter, but leaves them to be monuments of instability. ~ Institutes of the Christian Religion 2.5.3