אָמַר רַבִּי אַסֵּי מִפְּנֵי מָה מַתְחִילִין לַתִּינוֹקוֹת בְּתוֹרַת כֹּהֲנִים וְאֵין מַתְחִילִין בִּבְרֵאשִׁית, אֶלָּא שֶׁהַתִּינוֹקוֹת טְהוֹרִין וְהַקָּרְבָּנוֹת טְהוֹרִין יָבוֹאוּ טְהוֹרִין וְיִתְעַסְּקוּ בִּטְהוֹרִים.
Rabbi Assey said "Why do young children start [to learn Torah] with the laws of the priests (ie Leviticus)? Because young children are pure and the sacrifices are pure - pure ones should come and busy themselves with the pure.
(ח) רַבִּי פִּנְחָס בְּשֵׁם רַבִּי לֵוִי אָמַר מָשָׁל לְבֶן מֶלֶךְ שֶׁגַּס לִבּוֹ עָלָיו וְהָיָה לָמֵד לֶאֱכֹל בְּשַׂר נְבֵלוֹת וּטְרֵפוֹת, אָמַר הַמֶּלֶךְ זֶה יִהְיֶה תָּדִיר עַל שֻׁלְחָנִי וּמֵעַצְמוֹ הוּא נָדוּר [גדור], כָּךְ לְפִי שֶׁהָיוּ יִשְׂרָאֵל לְהוּטִים אַחַר עֲבוֹדַת כּוֹכָבִים בְּמִצְרַיִם וְהָיוּ מְבִיאִים קָרְבָּנֵיהֶם לַשְּׂעִירִים, דִּכְתִיב (ויקרא יז, ז): וְלֹא יִזְבְּחוּ עוֹד אֶת זִבְחֵיהֶם לַשְּׂעִירִים, וְאֵין שְׂעִירִים אֵלּוּ אֶלָּא שֵׁדִים, שֶׁנֶּאֱמַר (דברים לב, יז): וַיִּזְבְּחוּ לַשֵּׁדִים, וְאֵין שֵׁדִים אֵלּוּ אֶלָּא שְׂעִירִים, שֶׁנֶּאֱמַר (ישעיה יג, כא): וּשְׂעִירִים יְרַקְּדוּ שָׁם, וְהָיוּ מַקְרִיבִין קָרְבָּנֵיהֶם בְּאִסּוּר בָּמָּה וּפֻרְעָנֻיּוֹת בָּאוֹת עֲלֵיהֶם, אָמַר הַקָּדוֹשׁ בָּרוּךְ הוּא יִהְיוּ מַקְרִיבִין לְפָנַי בְּכָל עֵת קָרְבְּנוֹתֵיהֶן בְּאֹהֶל מוֹעֵד, וְהֵן נִפְרָשִׁים מֵעֲבוֹדַת כּוֹכָבִים וְהֵם נִיצוֹלִים, הֲדָא הוּא דִכְתִיב: אִישׁ אִישׁ מִבֵּית יִשְׂרָאֵל וגו'.
(8) Rabbi Pinhas in the name of Rabbi Levi stated: This is comparable to a king’s son who strayed and was accustomed to eat non-kosher meat. The king declared, “let him always eat at my table and on his own he will eventually become disciplined.” Similarly, because Israel was attached to idolatry in Egypt and would bring their sacrifices to the goat-demons, as it is written (Leviticus 17:7) "No longer shall you sacrifice to goat-demons, which refer to the shedim they sacrificed to (Deuternomy 32:17) "and they sacrificed to shedim", and those shedim refer to the goat-demons, as it says, (Isaiah 13:21) "and the goat [demons] shall prance there." And they would offer sacrifices on high places and retribution would befall them, the Holy One blessed be He said “let them offer sacrifices before Me at all times in the Tent of Meeting and they will be separated from idolatry and be saved.” This is the meaning of what is written (Leviticus 17:3-7): “Any man of the House of Israel who slaughters an ox or sheep or goat... and does not bring it to the entrance of the Tent of Meeting as a sacrifice to God.... that man will be cut off from among his people… so that they no longer offer their sacrifices to the goat-demons that they are wont to stray after."
Heavenly Torah, Abraham Joshua Heschel, as translated by Rabbi Gordon Tucker, pg. 86
The basic difference in attitude to the sacrifical system may be summarized thus:
In the school of Rabbi Ishamel the view was, "Not for my sake do you offer sacrifices, but for your sakes, to satisfy your needs. For My part, I am pleased that having given you the commandements, you fulfil My will, and I shall reward you."
In the school of Rabbi Akiva, the view was, "I desire nothing else but the sacrifices. Their sweet savor brings delight to Me."