So long as the sinner is permitted to appeal to his own judgement, he substitutes a hypocritical for a real righteousness. But after he is forced to weigh his conduct in the balance of the law, he renounces all dependence on this fancied righteousness; he sees that he is at an infinite distance from holiness and, on the other hand, that he teems with innumerable vices of which he formerly seemed free.

Institutes of Christian Religion—Vol 2 ch7.6