Why are but a few men saved?
The question as to how it is, that, in the whole, but a few men are converted, every one will easily answer himself when attending to that which has been stated already. For although it is true, that man can do nothing for the furtherance of his conversion, yet he may do a great deal to hinder it. It is true that he cannot work out his own conversion, but it is as true, that he can hinder his being converted. Suppose a man falling ill, then he cannot cure himself; but he can easily put an obstacle in the way of his recovery, in that he does not obey the injunctions of his medical adviser, and, casting from him his medicines, does every thing to augment his sickness. Or suppose a man, who has fallen into a deep hole, and on a rope being cast to him, by means of which he might be pulled up again, it is quite possible for such a one to reject this help, thus denying the help, by which he might be rescued. Now just as it is sufficient for a patient to submit himself to the injunctions of his Doctor, and not to withstand them, — or for one who has fallen in to a pit, in order to be pulled up again, merely to allow himself to be drawn up, where in both cases they have merely passively to subject themselves, — so it is sufficient for man, in his conversion not to withstand the Holy Ghost, but to allow him to work out his conversion, although he cannot do the least thing towards it.
Nicolaus Hunnius, Epitome Chapter XX, Conversion.