This is a long quote, but well worth the read:
“Arg. II. If the Lord intended that he should, and [he] by his death did, procure pardon of sin and reconciliation with God for all and every one, to be actually enjoyed upon condition that they do believe, then ought this good-will and intention of God, with this purchase in their behalf by Jesus Christ, to be made known to them by the word, that they might believe; “for faith cometh by hearing, and hearing by the word of God,” Rom. x. 17: for if these things be not made known and revealed to all and every one that is concerned in them, namely, to whom the Lord intends, and for whom he hath procured so great a good, then one of these things will follow; — either, first, That they may be saved without faith in, and the knowledge of, Christ (which they cannot have unless he be revealed to them), which is false, and proved so; or else, secondly, That this good-will of God, and this purchase made by Jesus Christ, is plainly in vain, and frustrate in respect of them, yea, a plain mocking of them, that will neither do them any good to help them out of misery, nor serve the justice of God to leave them inexcusable, for what blame can redound to them for not embracing and well using a benefit which they never heard of in their lives? Doth it become the wisdom of God to send Christ to die for men that they might be saved, and never cause these men to hear of any such thing; and yet to purpose and declare that unless they do hear of it and believe it, they shall never be saved? What wise man would pay a ransom for the delivery of those captives which he is sure shall never come to the knowledge of any such payment made, and so never be the better for it? Is it answerable to the goodness of God, to deal thus with his poor creatures? to hold out towards them all in pretence the most intense love imaginable, beyond all compare and illustration, — as his love in sending his Son is set forth to be, — and yet never let them know of any such thing, but in the end to damn them for not believing it? Is it answerable to the love and kindness of Christ to us, to assign unto him at his death such a resolution as this:— “I will now, by the oblation of myself, obtain for all and every one peace and reconciliation with God, redemption and everlasting salvation, eternal glory in the high heavens, even for all those poor, miserable, wretched worms, condemned caitiffs, that every hour ought to expect the sentence of condemnation; and all these shall truly and really be communicated to them if they will believe. But yet, withal, I will so order things that innumerable souls shall never hear one word of all this that I have done for them, never be persuaded to believe, nor have the object of faith that is to be believed proposed to them, whereby they might indeed possibly partake of these things?” Was this the mind and will, this the design and purpose, of our merciful high priest? God forbid. It is all one as if a prince should say and proclaim, that whereas there be a number of captives held in sore bondage in such a place, and he hath a full treasure, he is resolved to redeem them every one, so that every one of them shall come out of prison that will thank him for his good-will, and in the meantime never take care to let these poor captives know his mind and pleasure; and yet be fully assured that unless he effect it himself it will never be done. Would not this be conceived a vain and ostentatious flourish, without any good intent indeed towards the poor captives? Or as if a physician should say that he hath a medicine that will cure all diseases, and he intends to cure the diseases of all, but lets but very few know his mind, or any thing of his medicine; and yet is assured that without his relation and particular information it will be known to very few. And shall he be supposed to desire, intend, or aim at the recovery of all?”
-- John Owen, The Death of Death in the Death of Christ, The Banner of Truth Trust, Edinburgh, U.K., 1959, Reprinted 2002, pp126-127
The Death of Death can also be downloaded free from CCEL.