Unsaved Christians, saved unChristians?

Here is the truth in a little creed,
Enough for all the roads we go:
In Love is all the law we need;
In Christ is all the God we know.

(Edwin Markham)

Perhaps in Christ is all the God we know, but God cannot be confined to what we know.

As well as for his own desire that people should know God's love for them in Christ, CS Lewis is known for acknowledging truth in other faiths.

He also pointed out the differences. However in mid-evangelical flow in the book 'Miracles' Lewis wrote that even though: "We may know that only Christ can save ... we do not know that Christ can only save Christians."

This is a teaching echoed in the dogma of the Roman Catholic church, in this excerpt from Chapter 2 paras 14 - 17 of "DOGMATIC CONSTITUTION ON THE CHURCH - 'LUMEN GENTIUM' SOLEMNLY PROMULGATED BY HOLINESS POPE PAUL VI ON NOVEMBER 21, 1964":

"He is not saved, however, who, though part of the body of the Church, does not persevere in charity. He remains indeed in the bosom of the Church, but, as it were, only in a 'bodily' manner and not 'in his heart.'

All the Church's children should remember that their exalted status is to be attributed ... to the special grace of Christ. If they fail moreover to respond to that grace in thought, word and deed, not only shall they not be saved but they will be the more severely judged.

But the plan of salvation also includes those who acknowledge the Creator.

In the first place amongst these there are the Mohamedans, who, professing to hold the faith of Abraham, along with us adore the one and merciful God, who on the last day will judge mankind.

Nor is God far distant from those who in shadows and images seek the unknown God, for it is He who gives to all men life and breath and all things, and as Saviour wills that all men be saved.

Those also can attain to salvation who through no fault of their own do not know the Gospel of Christ or His Church, yet sincerely seek God and moved by grace strive by their deeds to do His will as it is known to them through the dictates of conscience.

Nor does Divine Providence deny the helps necessary for salvation to those who, without blame on their part, have not yet arrived at an explicit knowledge of God and with His grace strive to live a good life. Whatever good or truth is found amongst them is looked upon by the Church as a preparation for the Gospel. She knows that it is given by Him who enlightens all men so that they may finally have life.

But often men, deceived by the Evil One, have become vain in their reasonings and have exchanged the truth of God for a lie, serving the creature rather than the Creator. Or some there are who, living and dying in this world without God, are exposed to final despair.

Wherefore to promote the glory of God and procure the salvation of all of these, and mindful of the command of the Lord, 'Preach the Gospel to every creature', the Church fosters the missions with care and attention."