...וְאַחַר כָּךְ מְקַדֵּשׁ יָדָיו וְרַגְלָיו וּפוֹשֵׁט בִּגְדֵי זָהָב וְלוֹבֵשׁ בִּגְדֵי עַצְמוֹ וְיוֹצֵא לְבֵיתוֹ וְכָל הָעָם מְלַוִּין אוֹתוֹ עַד בֵּיתוֹ. וְיוֹם טוֹב הָיָה עוֹשֶׂה עַל שֶׁיָּצָא בְּשָׁלוֹם מִן הַקֹּדֶשׁ:
...He then sanctifies his hands and feet, removes his golden garments, puts on his own clothes and goes home. All of the people accompany him to his home. He would make a festive celebration because he departed from the holy place in peace.
Why would there be a festive celebration when the Kohen Gadol returned home?
...יָצָא וּבָא לוֹ בְדֶרֶךְ בֵּית כְּנִיסָתוֹ, וּמִתְפַּלֵּל תְּפִלָּה קְצָרָה בַּבַּיִת הַחִיצוֹן, וְלֹא הָיָה מַאֲרִיךְ בִּתְפִלָּתוֹ, שֶׁלֹּא לְהַבְעִית אֶת יִשְׂרָאֵל:
...He came out by the way he entered and in the outer house he uttered a short prayer. He did not make the prayer long so as not to frighten Israel.
Not to frighten Israel -- [if his return is delayed,] people will say that he died.
What message can we take from the celebration upon returning home?