Unsurprisingly, my daughter was not pleased to learn these things. In fact, she was somewhat distraught, saying that she didn't want to read a Christian book. While I certainly understood why this bothered her, I told her that the Christian elements were there whether she knew it or nor, and that she was better off knowing they were there than not. In fact, as the conversation developed, I pointed out that all non-Jewish fiction includes problematic elements of non-Jewish thinking, even when they are not explicitly religious. (This is also true for a great deal of "Jewish" fiction, including many of the books published by Orthodox publishers.) On the contrary, the most problematic literature is precisely that literature where the problematic elements are subtle and inconspicuous. When you read a book with an obvious agenda, you instinctively raise your guard and you challenge the assumptions and assertions in the text that endorse that agenda. But when the agenda is not obvious to the casual reader (as in the Narnia series), and even more so when the book truly has no agenda (because the author takes these premises for granted), then our guard is lowered and we are much more likely to accept the ideological, moral, cultural, and religious premises of the author without even realizing that we are being influenced.
This idea is alluded to in a teaching of the Vilna Gaon (פנינים משלחן הגר"א) in connection to the signs of a kosher animal. In Leviticus 11, the Torah tells us that a kosher animal must have two signs, it must have split hooves and it must chew its cud. The Torah then identifies four species that have only one sign, and which are therefore not kosher:
But, of the animals that chew their cud or that have split hooves, you shall not eat the following: the camel, because it chews its cud but does not have split hoves, is unclean to you. And the hyrax, because it chews its cud but does not have split hoves, is unclean to you. And the hare, because it chews its cud but does not have split hoves, is unclean to you. And the pig, because it has split hooves, and is cloven-footed, but does not chew its cud, is unclean to you. (Leviticus 11:4-7)Midrashically, these four species are identified with the four "exiles" of the Jewish people: Babylonia, Persia, Greece, and Rome. (ויקרא רבה יג:ה) The exile of Rome, which continues until today, is associated with the pig, which has the superficial sign of kashrus (split hooves) but lacks the inner sign (chewing the cud).
The Talmud (Yoma 9b) states:
מקדש ראשון מפני מה חרב? מפני ג' דברים שהיו בו ע"ז וגלוי עריות ושפיכות דמים וכו' אבל מקדש שני שהיו עוסקין בתורה ובמצות וגמילות חסדים מפני מה חרב? מפני שהיתה בו שנאת חנם, ללמדך ששקולה שנאת חנם כנגד שלש עבירות ע"ז גלוי עריות ושפיכות דמים וכו'
ר' יוחנן ור"א דאמרי תרווייהו ראשונים שנתגלה עונם נתגלה קצם, אחרונים שלא נתגלה עונם לא נתגלה קצם. אמר רבי יוחנן טובה צפורנן של ראשונים מכריסו של אחרונים.
Why was the first Temple destroyed? Because of three sins that were in its time: Idolatry, sexual immorality, and bloodshed. ... But, in the time of the second Temple, when they were busy with Torah, mitzvos, and acts of benevolence, why was it destroyed? Because of the sin of unjustified hatred that existed at that time. This teaches that the sin of unjustified hatred is equal in severity to the three sins of idolatry, sexual immorality, and bloodshed.
Rabbi Yochanan and Rabbi Eliezer both said, "For the earlier people (i.e. the exiles of the first Temple), whose sins were revealed, the end (of their exile) was revealed. (The prophet told them that they would return after 70 years.) For the later people (i.e. the exiles of the second Temple), whose sins were not revealed, the end (of their exile) was not revealed." Rabbi Yochanan said, "The fingernail of the earlier ones was greater than the belly of the later ones."
The essential point of the Vilna Gaon was summed up by Rav Dovid Tevele of Lissa (in a famous Shabbos HaGadol drasha in 1782, in which he condemned the proposed educational reforms of Naphtali Herz Wessely):
שהרשע המגלה רשעתו ירחיקו העם ממנו ולא ילמדו ממעשיו אבל הרשע אשר הרשעה טמונה בקרבו הוא לאבן נגף ולצור מכשול אשר יתלכדו העם אחריו והביטו אחר דבריו אשר במרמה ידבר.
The people know to distance themselves from an openly wicked person, and they do not learn from his actions, but a wicked person whose wickedness is hidden within is "a stone of stumbling and a rock of offence" who ensnares the people to follow him and to pay heed to his deceitful words.
Often, the biggest dangers are the least obvious, precisely because they are not obvious, and they therefore fail to elicit the normal protective responses against a threat. This is true in every area of life, including, perhaps especially, in the education of our children. While we certainly need to carefully screen the literature and entertainment that we expose our children to, we have to bear in mind the the biggest threats to be found in these areas are not necessarily the obvious ones. While we obviously shouldn't expose our children to outright immorality, the real challenge is often in the apparently "innocent" and "harmless" materials that we often expose our children to without hesitation.
For many parents, including myself, the natural gut reaction to this is to insist that our children only be exposed to purely "kosher" materials. Unfortunately, while this might be the ideal, I do not believe this is a realistic option for our children. Whether we acknowledge it or not, all of our homes, even the most insular, are permeated with the influences of the non-Jewish world. In the world in which we live today, there is no truly effective way to completely shut out the values, mores, and ideas of the non-Jewish world surrounding us. (As I mentioned earlier, more often than not, even ostensibly Orthodox Jewish literature carries such baggage within it.) As such, a simple policy of restricting our children's exposure is not only futile, but ultimately dangerous, as it fails to effectively train our children to recognize these influences and deal with them. So, while a certain degree of screening is certainly necessary, our general approach has to be to teach our children how to read (and watch) critically, from a proper Torah perspective.
Of course, this requires, first and foremost, a very strong Torah education. As the Sages teach us in Pirkei Avos, "הוי שקוד ללמוד תורה, ודע מה שתשיב לאפיקורוס" - "Be diligent in studying Torah, and know what to answer the non-believer." The first priority must always be Torah study. Nevertheless, in our generation, I believe it is also necessary for our children to have some exposure to non-Jewish literature, carefully guided, so that the children learn to read and think critically about such material. I readily acknowledge that this is not necessarily an easy thing to do, and that it requires a great deal of effort on the part of parents and teachers. However, I believe that this is the only truly responsible and effective approach in our time and place.